28758475

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{431}}^1$

素因数の和:615

約数の個数: 24

約数和(自身を含む): 38086848

約数和(自身を除く): 9328373

約数列:

[1, 5, 17, 25, 85, 157, 425, 431, 785, 2155, 2669, 3925, 7327, 10775, 13345, 36635, 66725, 67667, 183175, 338335, 1150339, 1691675, 5751695, 28758475]

約数ペア:

[(1, 28758475), (5, 5751695), (17, 1691675), (25, 1150339), (85, 338335), (157, 183175), (425, 67667), (431, 66725), (785, 36635), (2155, 13345), (2669, 10775), (3925, 7327)]