21211957

素因数分解:

${\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{1163}}^1$

素因数の和:1260

約数の個数: 16

約数和(自身を含む): 24248448

約数和(自身を除く): 3036491

約数列:

[1, 13, 23, 61, 299, 793, 1163, 1403, 15119, 18239, 26749, 70943, 347737, 922259, 1631689, 21211957]

約数ペア:

[(1, 21211957), (13, 1631689), (23, 922259), (61, 347737), (299, 70943), (793, 26749), (1163, 18239), (1403, 15119)]