20415280

素因数分解:

$2^4\times 5^1\times {\mathrm{255191}}^1$

素因数の和:255204

約数の個数: 20

約数和(自身を含む): 47465712

約数和(自身を除く): 27050432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255191, 510382, 1020764, 1275955, 2041528, 2551910, 4083056, 5103820, 10207640, 20415280]

約数ペア:

[(1, 20415280), (2, 10207640), (4, 5103820), (5, 4083056), (8, 2551910), (10, 2041528), (16, 1275955), (20, 1020764), (40, 510382), (80, 255191)]