21057688

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{43151}}^1$

素因数の和:43218

約数の個数: 16

約数和(自身を含む): 40131360

約数和(自身を除く): 19073672

約数列:

[1, 2, 4, 8, 61, 122, 244, 488, 43151, 86302, 172604, 345208, 2632211, 5264422, 10528844, 21057688]

約数ペア:

[(1, 21057688), (2, 10528844), (4, 5264422), (8, 2632211), (61, 345208), (122, 172604), (244, 86302), (488, 43151)]