21617999

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{4253}}^1$

素因数の和:4306

約数の個数: 16

約数和(自身を含む): 25728192

約数和(自身を除く): 4110193

約数列:

[1, 13, 17, 23, 221, 299, 391, 4253, 5083, 55289, 72301, 97819, 939913, 1271647, 1662923, 21617999]

約数ペア:

[(1, 21617999), (13, 1662923), (17, 1271647), (23, 939913), (221, 97819), (299, 72301), (391, 55289), (4253, 5083)]