21008840

素因数分解:

$2^3\times 5^1\times {\mathrm{525221}}^1$

素因数の和:525232

約数の個数: 16

約数和(自身を含む): 47269980

約数和(自身を除く): 26261140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525221, 1050442, 2100884, 2626105, 4201768, 5252210, 10504420, 21008840]

約数ペア:

[(1, 21008840), (2, 10504420), (4, 5252210), (5, 4201768), (8, 2626105), (10, 2100884), (20, 1050442), (40, 525221)]