20445815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18503}}^1$

素因数の和:18538

約数の個数: 16

約数和(自身を含む): 27978048

約数和(自身を除く): 7532233

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18503, 92515, 240539, 314551, 1202695, 1572755, 4089163, 20445815]

約数ペア:

[(1, 20445815), (5, 4089163), (13, 1572755), (17, 1202695), (65, 314551), (85, 240539), (221, 92515), (1105, 18503)]