21581408

素因数分解:

$2^5\times {\mathrm{674419}}^1$

素因数の和:674429

約数の個数: 12

約数和(自身を含む): 42488460

約数和(自身を除く): 20907052

約数列:

[1, 2, 4, 8, 16, 32, 674419, 1348838, 2697676, 5395352, 10790704, 21581408]

約数ペア:

[(1, 21581408), (2, 10790704), (4, 5395352), (8, 2697676), (16, 1348838), (32, 674419)]