21689161

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{251}}^1$

素因数の和:321

約数の個数: 24

約数和(自身を含む): 25994304

約数和(自身を除く): 4305143

約数列:

[1, 13, 17, 23, 221, 251, 289, 299, 391, 3263, 3757, 4267, 5083, 5773, 6647, 55471, 72539, 75049, 86411, 98141, 943007, 1275833, 1668397, 21689161]

約数ペア:

[(1, 21689161), (13, 1668397), (17, 1275833), (23, 943007), (221, 98141), (251, 86411), (289, 75049), (299, 72539), (391, 55471), (3263, 6647), (3757, 5773), (4267, 5083)]