21819740

素因数分解:

$2^2\times 5^1\times {\mathrm{853}}^1\times {\mathrm{1279}}^1$

素因数の和:2141

約数の個数: 24

約数和(自身を含む): 45911040

約数和(自身を除く): 24091300

約数列:

[1, 2, 4, 5, 10, 20, 853, 1279, 1706, 2558, 3412, 4265, 5116, 6395, 8530, 12790, 17060, 25580, 1090987, 2181974, 4363948, 5454935, 10909870, 21819740]

約数ペア:

[(1, 21819740), (2, 10909870), (4, 5454935), (5, 4363948), (10, 2181974), (20, 1090987), (853, 25580), (1279, 17060), (1706, 12790), (2558, 8530), (3412, 6395), (4265, 5116)]