21931515

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11887}}^1$

素因数の和:11939

約数の個数: 24

約数和(自身を含む): 38945088

約数和(自身を除く): 17013573

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 11887, 35661, 59435, 106983, 178305, 487367, 534915, 1462101, 2436835, 4386303, 7310505, 21931515]

約数ペア:

[(1, 21931515), (3, 7310505), (5, 4386303), (9, 2436835), (15, 1462101), (41, 534915), (45, 487367), (123, 178305), (205, 106983), (369, 59435), (615, 35661), (1845, 11887)]