21243705

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{4129}}^1$

素因数の和:4158

約数の個数: 32

約数和(自身を含む): 39648000

約数和(自身を除く): 18404295

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 4129, 5145, 12387, 20645, 28903, 61935, 86709, 144515, 202321, 433545, 606963, 1011605, 1416247, 3034815, 4248741, 7081235, 21243705]

約数ペア:

[(1, 21243705), (3, 7081235), (5, 4248741), (7, 3034815), (15, 1416247), (21, 1011605), (35, 606963), (49, 433545), (105, 202321), (147, 144515), (245, 86709), (343, 61935), (735, 28903), (1029, 20645), (1715, 12387), (4129, 5145)]