21065620

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{7069}}^1$

素因数の和:7227

約数の個数: 24

約数和(自身を含む): 44541000

約数和(自身を除く): 23475380

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 7069, 14138, 28276, 35345, 70690, 141380, 1053281, 2106562, 4213124, 5266405, 10532810, 21065620]

約数ペア:

[(1, 21065620), (2, 10532810), (4, 5266405), (5, 4213124), (10, 2106562), (20, 1053281), (149, 141380), (298, 70690), (596, 35345), (745, 28276), (1490, 14138), (2980, 7069)]