18908560

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21487}}^1$

素因数の和:21511

約数の個数: 40

約数和(自身を含む): 47961216

約数和(自身を除く): 29052656

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21487, 42974, 85948, 107435, 171896, 214870, 236357, 343792, 429740, 472714, 859480, 945428, 1181785, 1718960, 1890856, 2363570, 3781712, 4727140, 9454280, 18908560]

約数ペア:

[(1, 18908560), (2, 9454280), (4, 4727140), (5, 3781712), (8, 2363570), (10, 1890856), (11, 1718960), (16, 1181785), (20, 945428), (22, 859480), (40, 472714), (44, 429740), (55, 343792), (80, 236357), (88, 214870), (110, 171896), (176, 107435), (220, 85948), (440, 42974), (880, 21487)]