20642840

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4567}}^1$

素因数の和:4691

約数の個数: 32

約数和(自身を含む): 46867680

約数和(自身を除く): 26224840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 4567, 9134, 18268, 22835, 36536, 45670, 91340, 182680, 516071, 1032142, 2064284, 2580355, 4128568, 5160710, 10321420, 20642840]

約数ペア:

[(1, 20642840), (2, 10321420), (4, 5160710), (5, 4128568), (8, 2580355), (10, 2064284), (20, 1032142), (40, 516071), (113, 182680), (226, 91340), (452, 45670), (565, 36536), (904, 22835), (1130, 18268), (2260, 9134), (4520, 4567)]