20781260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25343}}^1$

素因数の和:25393

約数の個数: 24

約数和(自身を含む): 44706816

約数和(自身を除く): 23925556

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25343, 50686, 101372, 126715, 253430, 506860, 1039063, 2078126, 4156252, 5195315, 10390630, 20781260]

約数ペア:

[(1, 20781260), (2, 10390630), (4, 5195315), (5, 4156252), (10, 2078126), (20, 1039063), (41, 506860), (82, 253430), (164, 126715), (205, 101372), (410, 50686), (820, 25343)]