21808385

素因数分解:

$5^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1\times {\mathrm{401}}^1$

素因数の和:628

約数の個数: 16

約数和(自身を含む): 26773200

約数和(自身を除く): 4964815

約数列:

[1, 5, 73, 149, 365, 401, 745, 2005, 10877, 29273, 54385, 59749, 146365, 298745, 4361677, 21808385]

約数ペア:

[(1, 21808385), (5, 4361677), (73, 298745), (149, 146365), (365, 59749), (401, 54385), (745, 29273), (2005, 10877)]