218698540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{643231}}^1$

素因数の和:643257

約数の個数: 24

約数和(自身を含む): 486283392

約数和(自身を除く): 267584852

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 643231, 1286462, 2572924, 3216155, 6432310, 10934927, 12864620, 21869854, 43739708, 54674635, 109349270, 218698540]

約数ペア:

[(1, 218698540), (2, 109349270), (4, 54674635), (5, 43739708), (10, 21869854), (17, 12864620), (20, 10934927), (34, 6432310), (68, 3216155), (85, 2572924), (170, 1286462), (340, 643231)]