217620455

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{257539}}^1$

素因数の和:257570

約数の個数: 12

約数和(自身を含む): 282778920

約数和(自身を除く): 65158465

約数列:

[1, 5, 13, 65, 169, 845, 257539, 1287695, 3348007, 16740035, 43524091, 217620455]

約数ペア:

[(1, 217620455), (5, 43524091), (13, 16740035), (65, 3348007), (169, 1287695), (845, 257539)]