21644540

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4211}}^1$

素因数の和:4477

約数の個数: 24

約数和(自身を含む): 45641232

約数和(自身を除く): 23996692

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4211, 5140, 8422, 16844, 21055, 42110, 84220, 1082227, 2164454, 4328908, 5411135, 10822270, 21644540]

約数ペア:

[(1, 21644540), (2, 10822270), (4, 5411135), (5, 4328908), (10, 2164454), (20, 1082227), (257, 84220), (514, 42110), (1028, 21055), (1285, 16844), (2570, 8422), (4211, 5140)]