646501040

素因数分解:

$2^4\times 5^1\times {\mathrm{8081263}}^1$

素因数の和:8081276

約数の個数: 20

約数和(自身を含む): 1503115104

約数和(自身を除く): 856614064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8081263, 16162526, 32325052, 40406315, 64650104, 80812630, 129300208, 161625260, 323250520, 646501040]

約数ペア:

[(1, 646501040), (2, 323250520), (4, 161625260), (5, 129300208), (8, 80812630), (10, 64650104), (16, 40406315), (20, 32325052), (40, 16162526), (80, 8081263)]