128207620

素因数分解:

$2^2\times 5^1\times {\mathrm{487}}^1\times {\mathrm{13163}}^1$

素因数の和:13659

約数の個数: 24

約数和(自身を含む): 269809344

約数和(自身を除く): 141601724

約数列:

[1, 2, 4, 5, 10, 20, 487, 974, 1948, 2435, 4870, 9740, 13163, 26326, 52652, 65815, 131630, 263260, 6410381, 12820762, 25641524, 32051905, 64103810, 128207620]

約数ペア:

[(1, 128207620), (2, 64103810), (4, 32051905), (5, 25641524), (10, 12820762), (20, 6410381), (487, 263260), (974, 131630), (1948, 65815), (2435, 52652), (4870, 26326), (9740, 13163)]