15985040

素因数分解:

$2^4\times 5^1\times {\mathrm{199813}}^1$

素因数の和:199826

約数の個数: 20

約数和(自身を含む): 37165404

約数和(自身を除く): 21180364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199813, 399626, 799252, 999065, 1598504, 1998130, 3197008, 3996260, 7992520, 15985040]

約数ペア:

[(1, 15985040), (2, 7992520), (4, 3996260), (5, 3197008), (8, 1998130), (10, 1598504), (16, 999065), (20, 799252), (40, 399626), (80, 199813)]