21475620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{521}}^1$

素因数の和:765

約数の個数: 72

約数和(自身を含む): 65552760

約数和(自身を除く): 44077140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 229, 458, 521, 687, 916, 1042, 1145, 1374, 1563, 2061, 2084, 2290, 2605, 2748, 3126, 3435, 4122, 4580, 4689, 5210, 6252, 6870, 7815, 8244, 9378, 10305, 10420, 13740, 15630, 18756, 20610, 23445, 31260, 41220, 46890, 93780, 119309, 238618, 357927, 477236, 596545, 715854, 1073781, 1193090, 1431708, 1789635, 2147562, 2386180, 3579270, 4295124, 5368905, 7158540, 10737810, 21475620]

約数ペア:

[(1, 21475620), (2, 10737810), (3, 7158540), (4, 5368905), (5, 4295124), (6, 3579270), (9, 2386180), (10, 2147562), (12, 1789635), (15, 1431708), (18, 1193090), (20, 1073781), (30, 715854), (36, 596545), (45, 477236), (60, 357927), (90, 238618), (180, 119309), (229, 93780), (458, 46890), (521, 41220), (687, 31260), (916, 23445), (1042, 20610), (1145, 18756), (1374, 15630), (1563, 13740), (2061, 10420), (2084, 10305), (2290, 9378), (2605, 8244), (2748, 7815), (3126, 6870), (3435, 6252), (4122, 5210), (4580, 4689)]