18902120

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{947}}^1$

素因数の和:1457

約数の個数: 32

約数和(自身を含む): 42660000

約数和(自身を除く): 23757880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 947, 998, 1894, 1996, 2495, 3788, 3992, 4735, 4990, 7576, 9470, 9980, 18940, 19960, 37880, 472553, 945106, 1890212, 2362765, 3780424, 4725530, 9451060, 18902120]

約数ペア:

[(1, 18902120), (2, 9451060), (4, 4725530), (5, 3780424), (8, 2362765), (10, 1890212), (20, 945106), (40, 472553), (499, 37880), (947, 19960), (998, 18940), (1894, 9980), (1996, 9470), (2495, 7576), (3788, 4990), (3992, 4735)]