8738420

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^2$

素因数の和:1331

約数の個数: 18

約数和(自身を含む): 18378486

約数和(自身を除く): 9640066

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2644, 3305, 6610, 13220, 436921, 873842, 1747684, 2184605, 4369210, 8738420]

約数ペア:

[(1, 8738420), (2, 4369210), (4, 2184605), (5, 1747684), (10, 873842), (20, 436921), (661, 13220), (1322, 6610), (2644, 3305)]