20697755

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18731}}^1$

素因数の和:18766

約数の個数: 16

約数和(自身を含む): 28322784

約数和(自身を除く): 7625029

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18731, 93655, 243503, 318427, 1217515, 1592135, 4139551, 20697755]

約数ペア:

[(1, 20697755), (5, 4139551), (13, 1592135), (17, 1217515), (65, 318427), (85, 243503), (221, 93655), (1105, 18731)]