21705820

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{14867}}^1$

素因数の和:14949

約数の個数: 24

約数和(自身を含む): 46209744

約数和(自身を除く): 24503924

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 14867, 29734, 59468, 74335, 148670, 297340, 1085291, 2170582, 4341164, 5426455, 10852910, 21705820]

約数ペア:

[(1, 21705820), (2, 10852910), (4, 5426455), (5, 4341164), (10, 2170582), (20, 1085291), (73, 297340), (146, 148670), (292, 74335), (365, 59468), (730, 29734), (1460, 14867)]