21639905

素因数分解:

$5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{6947}}^1$

素因数の和:7048

約数の個数: 16

約数和(自身を含む): 30015360

約数和(自身を除く): 8375455

約数列:

[1, 5, 7, 35, 89, 445, 623, 3115, 6947, 34735, 48629, 243145, 618283, 3091415, 4327981, 21639905]

約数ペア:

[(1, 21639905), (5, 4327981), (7, 3091415), (35, 618283), (89, 243145), (445, 48629), (623, 34735), (3115, 6947)]