21320195

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{1097}}^1$

素因数の和:1151

約数の個数: 24

約数和(自身を含む): 28934496

約数和(自身を除く): 7614301

約数列:

[1, 5, 13, 23, 65, 115, 169, 299, 845, 1097, 1495, 3887, 5485, 14261, 19435, 25231, 71305, 126155, 185393, 328003, 926965, 1640015, 4264039, 21320195]

約数ペア:

[(1, 21320195), (5, 4264039), (13, 1640015), (23, 926965), (65, 328003), (115, 185393), (169, 126155), (299, 71305), (845, 25231), (1097, 19435), (1495, 14261), (3887, 5485)]