64231280

素因数分解:

$2^4\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1609}}^1$

素因数の和:2121

約数の個数: 40

約数和(自身を含む): 149730000

約数和(自身を除く): 85498720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499, 998, 1609, 1996, 2495, 3218, 3992, 4990, 6436, 7984, 8045, 9980, 12872, 16090, 19960, 25744, 32180, 39920, 64360, 128720, 802891, 1605782, 3211564, 4014455, 6423128, 8028910, 12846256, 16057820, 32115640, 64231280]

約数ペア:

[(1, 64231280), (2, 32115640), (4, 16057820), (5, 12846256), (8, 8028910), (10, 6423128), (16, 4014455), (20, 3211564), (40, 1605782), (80, 802891), (499, 128720), (998, 64360), (1609, 39920), (1996, 32180), (2495, 25744), (3218, 19960), (3992, 16090), (4990, 12872), (6436, 9980), (7984, 8045)]