20754405

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1607}}^1$

素因数の和:1666

約数の個数: 48

約数和(自身を含む): 42142464

約数和(自身を除く): 21388059

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1607, 1845, 2583, 4305, 4821, 8035, 11249, 12915, 14463, 24105, 33747, 56245, 65887, 72315, 101241, 168735, 197661, 329435, 461209, 506205, 592983, 988305, 1383627, 2306045, 2964915, 4150881, 6918135, 20754405]

約数ペア:

[(1, 20754405), (3, 6918135), (5, 4150881), (7, 2964915), (9, 2306045), (15, 1383627), (21, 988305), (35, 592983), (41, 506205), (45, 461209), (63, 329435), (105, 197661), (123, 168735), (205, 101241), (287, 72315), (315, 65887), (369, 56245), (615, 33747), (861, 24105), (1435, 14463), (1607, 12915), (1845, 11249), (2583, 8035), (4305, 4821)]