20400560

素因数分解:

$2^4\times 5^1\times {\mathrm{255007}}^1$

素因数の和:255020

約数の個数: 20

約数和(自身を含む): 47431488

約数和(自身を除く): 27030928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255007, 510014, 1020028, 1275035, 2040056, 2550070, 4080112, 5100140, 10200280, 20400560]

約数ペア:

[(1, 20400560), (2, 10200280), (4, 5100140), (5, 4080112), (8, 2550070), (10, 2040056), (16, 1275035), (20, 1020028), (40, 510014), (80, 255007)]