21553415

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{1109}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 29250720

約数和(自身を除く): 7697305

約数列:

[1, 5, 13, 23, 65, 115, 169, 299, 845, 1109, 1495, 3887, 5545, 14417, 19435, 25507, 72085, 127535, 187421, 331591, 937105, 1657955, 4310683, 21553415]

約数ペア:

[(1, 21553415), (5, 4310683), (13, 1657955), (23, 937105), (65, 331591), (115, 187421), (169, 127535), (299, 72085), (845, 25507), (1109, 19435), (1495, 14417), (3887, 5545)]