21311225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{2851}}^1$

素因数の和:2897

約数の個数: 24

約数和(自身を含む): 29706432

約数和(自身を除く): 8395207

約数列:

[1, 5, 13, 23, 25, 65, 115, 299, 325, 575, 1495, 2851, 7475, 14255, 37063, 65573, 71275, 185315, 327865, 852449, 926575, 1639325, 4262245, 21311225]

約数ペア:

[(1, 21311225), (5, 4262245), (13, 1639325), (23, 926575), (25, 852449), (65, 327865), (115, 185315), (299, 71275), (325, 65573), (575, 37063), (1495, 14255), (2851, 7475)]