21296840

素因数分解:

$2^3\times 5^1\times {\mathrm{532421}}^1$

素因数の和:532432

約数の個数: 16

約数和(自身を含む): 47917980

約数和(自身を除く): 26621140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 532421, 1064842, 2129684, 2662105, 4259368, 5324210, 10648420, 21296840]

約数ペア:

[(1, 21296840), (2, 10648420), (4, 5324210), (5, 4259368), (8, 2662105), (10, 2129684), (20, 1064842), (40, 532421)]