21358389

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{103}}^1\times {\mathrm{409}}^1$

素因数の和:541

約数の個数: 24

約数和(自身を含む): 31212480

約数和(自身を除く): 9854091

約数列:

[1, 3, 13, 39, 103, 169, 309, 409, 507, 1227, 1339, 4017, 5317, 15951, 17407, 42127, 52221, 69121, 126381, 207363, 547651, 1642953, 7119463, 21358389]

約数ペア:

[(1, 21358389), (3, 7119463), (13, 1642953), (39, 547651), (103, 207363), (169, 126381), (309, 69121), (409, 52221), (507, 42127), (1227, 17407), (1339, 15951), (4017, 5317)]