21297620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{34351}}^1$

素因数の和:34391

約数の個数: 24

約数和(自身を含む): 46169088

約数和(自身を除く): 24871468

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 34351, 68702, 137404, 171755, 343510, 687020, 1064881, 2129762, 4259524, 5324405, 10648810, 21297620]

約数ペア:

[(1, 21297620), (2, 10648810), (4, 5324405), (5, 4259524), (10, 2129762), (20, 1064881), (31, 687020), (62, 343510), (124, 171755), (155, 137404), (310, 68702), (620, 34351)]