640005454

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{398509}}^1$

素因数の和:398595

約数の個数: 16

約数和(自身を含む): 1061630640

約数和(自身を除く): 421625186

約数列:

[1, 2, 11, 22, 73, 146, 803, 1606, 398509, 797018, 4383599, 8767198, 29091157, 58182314, 320002727, 640005454]

約数ペア:

[(1, 640005454), (2, 320002727), (11, 58182314), (22, 29091157), (73, 8767198), (146, 4383599), (803, 797018), (1606, 398509)]