21495490

素因数分解:

$2^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{3343}}^1$

素因数の和:3993

約数の個数: 16

約数和(自身を含む): 38763648

約数和(自身を除く): 17268158

約数列:

[1, 2, 5, 10, 643, 1286, 3215, 3343, 6430, 6686, 16715, 33430, 2149549, 4299098, 10747745, 21495490]

約数ペア:

[(1, 21495490), (2, 10747745), (5, 4299098), (10, 2149549), (643, 33430), (1286, 16715), (3215, 6686), (3343, 6430)]