21081028

素因数分解:

$2^2\times {\mathrm{29}}^1\times {\mathrm{263}}^1\times {\mathrm{691}}^1$

素因数の和:987

約数の個数: 24

約数和(自身を含む): 38364480

約数和(自身を除く): 17283452

約数列:

[1, 2, 4, 29, 58, 116, 263, 526, 691, 1052, 1382, 2764, 7627, 15254, 20039, 30508, 40078, 80156, 181733, 363466, 726932, 5270257, 10540514, 21081028]

約数ペア:

[(1, 21081028), (2, 10540514), (4, 5270257), (29, 726932), (58, 363466), (116, 181733), (263, 80156), (526, 40078), (691, 30508), (1052, 20039), (1382, 15254), (2764, 7627)]