20801840

素因数分解:

$2^4\times 5^1\times {\mathrm{260023}}^1$

素因数の和:260036

約数の個数: 20

約数和(自身を含む): 48364464

約数和(自身を除く): 27562624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260023, 520046, 1040092, 1300115, 2080184, 2600230, 4160368, 5200460, 10400920, 20801840]

約数ペア:

[(1, 20801840), (2, 10400920), (4, 5200460), (5, 4160368), (8, 2600230), (10, 2080184), (16, 1300115), (20, 1040092), (40, 520046), (80, 260023)]