128941240

素因数分解:

$2^3\times 5^1\times {\mathrm{3223531}}^1$

素因数の和:3223542

約数の個数: 16

約数和(自身を含む): 290117880

約数和(自身を除く): 161176640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3223531, 6447062, 12894124, 16117655, 25788248, 32235310, 64470620, 128941240]

約数ペア:

[(1, 128941240), (2, 64470620), (4, 32235310), (5, 25788248), (8, 16117655), (10, 12894124), (20, 6447062), (40, 3223531)]