19720493

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{181}}^1$

素因数の和:257

約数の個数: 24

約数和(自身を含む): 23467080

約数和(自身を除く): 3746587

約数列:

[1, 13, 17, 29, 181, 221, 289, 377, 493, 2353, 3077, 3757, 5249, 6409, 8381, 40001, 52309, 68237, 89233, 108953, 680017, 1160029, 1516961, 19720493]

約数ペア:

[(1, 19720493), (13, 1516961), (17, 1160029), (29, 680017), (181, 108953), (221, 89233), (289, 68237), (377, 52309), (493, 40001), (2353, 8381), (3077, 6409), (3757, 5249)]