81464140

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{24989}}^1$

素因数の和:25161

約数の個数: 24

約数和(自身を含む): 172131120

約数和(自身を除く): 90666980

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 24989, 49978, 99956, 124945, 249890, 499780, 4073207, 8146414, 16292828, 20366035, 40732070, 81464140]

約数ペア:

[(1, 81464140), (2, 40732070), (4, 20366035), (5, 16292828), (10, 8146414), (20, 4073207), (163, 499780), (326, 249890), (652, 124945), (815, 99956), (1630, 49978), (3260, 24989)]