They are:
(1, 780)
(2, 390)
(3, 260)
(4, 195)
(5, 156)
(6, 130)
(10, 78)
(12, 65)
(13, 60)
(15, 52)
(20, 39)
(26, 30)
The prime factors of 780 are: 2,3,5,13
24 factors.
780, 1560, 2340 and 3120
The paired prime factors of 150 are: 5 x 5
As a product of its prime factors: 2*2*3*5*13 = 780
Any of its factors
3
The divisors of 780 are 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, and 780. The prime factorization of 780 is 2x2x3x5x13, and the four different prime factors of 780 are 2, 3, 5, and 13.
The factors of 780 are: 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
780 is divisible by 2 because it's even. 780 is divisible by 3 because its digits total a multiple of 3. 780 is divisible by 5 because it ends in a 0. 780 is divisible by 10 because it ends in a 0.
8
(1,9) (3,3)