66546640

素因数分解:

$2^4\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1667}}^1$

素因数の和:2179

約数の個数: 40

約数和(自身を含む): 155124000

約数和(自身を除く): 88577360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499, 998, 1667, 1996, 2495, 3334, 3992, 4990, 6668, 7984, 8335, 9980, 13336, 16670, 19960, 26672, 33340, 39920, 66680, 133360, 831833, 1663666, 3327332, 4159165, 6654664, 8318330, 13309328, 16636660, 33273320, 66546640]

約数ペア:

[(1, 66546640), (2, 33273320), (4, 16636660), (5, 13309328), (8, 8318330), (10, 6654664), (16, 4159165), (20, 3327332), (40, 1663666), (80, 831833), (499, 133360), (998, 66680), (1667, 39920), (1996, 33340), (2495, 26672), (3334, 19960), (3992, 16670), (4990, 13336), (6668, 9980), (7984, 8335)]