20801008

素因数分解:

$2^4\times {\mathrm{809}}^1\times {\mathrm{1607}}^1$

素因数の和:2424

約数の個数: 20

約数和(自身を含む): 40376880

約数和(自身を除く): 19575872

約数列:

[1, 2, 4, 8, 16, 809, 1607, 1618, 3214, 3236, 6428, 6472, 12856, 12944, 25712, 1300063, 2600126, 5200252, 10400504, 20801008]

約数ペア:

[(1, 20801008), (2, 10400504), (4, 5200252), (8, 2600126), (16, 1300063), (809, 25712), (1607, 12944), (1618, 12856), (3214, 6472), (3236, 6428)]