21405405

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29123}}^1$

素因数の和:29145

約数の個数: 24

約数和(自身を含む): 39841632

約数和(自身を除く): 18436227

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 29123, 87369, 145615, 203861, 436845, 611583, 1019305, 1427027, 3057915, 4281081, 7135135, 21405405]

約数ペア:

[(1, 21405405), (3, 7135135), (5, 4281081), (7, 3057915), (15, 1427027), (21, 1019305), (35, 611583), (49, 436845), (105, 203861), (147, 145615), (245, 87369), (735, 29123)]