21381860

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{9461}}^1$

素因数の和:9583

約数の個数: 24

約数和(自身を含む): 45304056

約数和(自身を除く): 23922196

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 9461, 18922, 37844, 47305, 94610, 189220, 1069093, 2138186, 4276372, 5345465, 10690930, 21381860]

約数ペア:

[(1, 21381860), (2, 10690930), (4, 5345465), (5, 4276372), (10, 2138186), (20, 1069093), (113, 189220), (226, 94610), (452, 47305), (565, 37844), (1130, 18922), (2260, 9461)]