21942380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26759}}^1$

素因数の和:26809

約数の個数: 24

約数和(自身を含む): 47204640

約数和(自身を除く): 25262260

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26759, 53518, 107036, 133795, 267590, 535180, 1097119, 2194238, 4388476, 5485595, 10971190, 21942380]

約数ペア:

[(1, 21942380), (2, 10971190), (4, 5485595), (5, 4388476), (10, 2194238), (20, 1097119), (41, 535180), (82, 267590), (164, 133795), (205, 107036), (410, 53518), (820, 26759)]