20851760

素因数分解:

$2^4\times 5^1\times {\mathrm{260647}}^1$

素因数の和:260660

約数の個数: 20

約数和(自身を含む): 48480528

約数和(自身を除く): 27628768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260647, 521294, 1042588, 1303235, 2085176, 2606470, 4170352, 5212940, 10425880, 20851760]

約数ペア:

[(1, 20851760), (2, 10425880), (4, 5212940), (5, 4170352), (8, 2606470), (10, 2085176), (16, 1303235), (20, 1042588), (40, 521294), (80, 260647)]