21009605

素因数分解:

$5^1\times {\mathrm{59}}^1\times {\mathrm{229}}^1\times {\mathrm{311}}^1$

素因数の和:604

約数の個数: 16

約数和(自身を含む): 25833600

約数和(自身を除く): 4823995

約数列:

[1, 5, 59, 229, 295, 311, 1145, 1555, 13511, 18349, 67555, 71219, 91745, 356095, 4201921, 21009605]

約数ペア:

[(1, 21009605), (5, 4201921), (59, 356095), (229, 91745), (295, 71219), (311, 67555), (1145, 18349), (1555, 13511)]