21358155

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15647}}^1$

素因数の和:15675

約数の個数: 32

約数和(自身を含む): 42061824

約数和(自身を除く): 20703669

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15647, 46941, 78235, 109529, 203411, 234705, 328587, 547645, 610233, 1017055, 1423877, 1642935, 3051165, 4271631, 7119385, 21358155]

約数ペア:

[(1, 21358155), (3, 7119385), (5, 4271631), (7, 3051165), (13, 1642935), (15, 1423877), (21, 1017055), (35, 610233), (39, 547645), (65, 328587), (91, 234705), (105, 203411), (195, 109529), (273, 78235), (455, 46941), (1365, 15647)]