18638680

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3557}}^1$

素因数の和:3699

約数の個数: 32

約数和(自身を含む): 42269040

約数和(自身を除く): 23630360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3557, 5240, 7114, 14228, 17785, 28456, 35570, 71140, 142280, 465967, 931934, 1863868, 2329835, 3727736, 4659670, 9319340, 18638680]

約数ペア:

[(1, 18638680), (2, 9319340), (4, 4659670), (5, 3727736), (8, 2329835), (10, 1863868), (20, 931934), (40, 465967), (131, 142280), (262, 71140), (524, 35570), (655, 28456), (1048, 17785), (1310, 14228), (2620, 7114), (3557, 5240)]