20878375

素因数分解:

$5^3\times 7^1\times {\mathrm{107}}^1\times {\mathrm{223}}^1$

素因数の和:352

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 9313241

約数列:

[1, 5, 7, 25, 35, 107, 125, 175, 223, 535, 749, 875, 1115, 1561, 2675, 3745, 5575, 7805, 13375, 18725, 23861, 27875, 39025, 93625, 119305, 167027, 195125, 596525, 835135, 2982625, 4175675, 20878375]

約数ペア:

[(1, 20878375), (5, 4175675), (7, 2982625), (25, 835135), (35, 596525), (107, 195125), (125, 167027), (175, 119305), (223, 93625), (535, 39025), (749, 27875), (875, 23861), (1115, 18725), (1561, 13375), (2675, 7805), (3745, 5575)]