31905040

素因数分解:

$2^4\times 5^1\times {\mathrm{398813}}^1$

素因数の和:398826

約数の個数: 20

約数和(自身を含む): 74179404

約数和(自身を除く): 42274364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 398813, 797626, 1595252, 1994065, 3190504, 3988130, 6381008, 7976260, 15952520, 31905040]

約数ペア:

[(1, 31905040), (2, 15952520), (4, 7976260), (5, 6381008), (8, 3988130), (10, 3190504), (16, 1994065), (20, 1595252), (40, 797626), (80, 398813)]