20815960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47309}}^1$

素因数の和:47331

約数の個数: 32

約数和(自身を含む): 51094800

約数和(自身を除く): 30278840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47309, 94618, 189236, 236545, 378472, 473090, 520399, 946180, 1040798, 1892360, 2081596, 2601995, 4163192, 5203990, 10407980, 20815960]

約数ペア:

[(1, 20815960), (2, 10407980), (4, 5203990), (5, 4163192), (8, 2601995), (10, 2081596), (11, 1892360), (20, 1040798), (22, 946180), (40, 520399), (44, 473090), (55, 378472), (88, 236545), (110, 189236), (220, 94618), (440, 47309)]