21589780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1\times {\mathrm{233}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 47056464

約数和(自身を除く): 25466684

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 113, 164, 205, 226, 233, 410, 452, 466, 565, 820, 932, 1130, 1165, 2260, 2330, 4633, 4660, 9266, 9553, 18532, 19106, 23165, 26329, 38212, 46330, 47765, 52658, 92660, 95530, 105316, 131645, 191060, 263290, 526580, 1079489, 2158978, 4317956, 5397445, 10794890, 21589780]

約数ペア:

[(1, 21589780), (2, 10794890), (4, 5397445), (5, 4317956), (10, 2158978), (20, 1079489), (41, 526580), (82, 263290), (113, 191060), (164, 131645), (205, 105316), (226, 95530), (233, 92660), (410, 52658), (452, 47765), (466, 46330), (565, 38212), (820, 26329), (932, 23165), (1130, 19106), (1165, 18532), (2260, 9553), (2330, 9266), (4633, 4660)]