21304985

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{1327}}^1$

素因数の和:1377

約数の個数: 24

約数和(自身を含む): 29162880

約数和(自身を除く): 7857895

約数列:

[1, 5, 13, 19, 65, 95, 169, 247, 845, 1235, 1327, 3211, 6635, 16055, 17251, 25213, 86255, 126065, 224263, 327769, 1121315, 1638845, 4260997, 21304985]

約数ペア:

[(1, 21304985), (5, 4260997), (13, 1638845), (19, 1121315), (65, 327769), (95, 224263), (169, 126065), (247, 86255), (845, 25213), (1235, 17251), (1327, 16055), (3211, 6635)]