20401840

素因数分解:

$2^4\times 5^1\times {\mathrm{255023}}^1$

素因数の和:255036

約数の個数: 20

約数和(自身を含む): 47434464

約数和(自身を除く): 27032624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255023, 510046, 1020092, 1275115, 2040184, 2550230, 4080368, 5100460, 10200920, 20401840]

約数ペア:

[(1, 20401840), (2, 10200920), (4, 5100460), (5, 4080368), (8, 2550230), (10, 2040184), (16, 1275115), (20, 1020092), (40, 510046), (80, 255023)]