408640

素因数分解:

$2^6\times 5^1\times {\mathrm{1277}}^1$

素因数の和:1294

約数の個数: 28

約数和(自身を含む): 973836

約数和(自身を除く): 565196

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1277, 2554, 5108, 6385, 10216, 12770, 20432, 25540, 40864, 51080, 81728, 102160, 204320, 408640]

約数ペア:

[(1, 408640), (2, 204320), (4, 102160), (5, 81728), (8, 51080), (10, 40864), (16, 25540), (20, 20432), (32, 12770), (40, 10216), (64, 6385), (80, 5108), (160, 2554), (320, 1277)]