20465705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18521}}^1$

素因数の和:18556

約数の個数: 16

約数和(自身を含む): 28005264

約数和(自身を除く): 7539559

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18521, 92605, 240773, 314857, 1203865, 1574285, 4093141, 20465705]

約数ペア:

[(1, 20465705), (5, 4093141), (13, 1574285), (17, 1203865), (65, 314857), (85, 240773), (221, 92605), (1105, 18521)]