19082020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{15641}}^1$

素因数の和:15711

約数の個数: 24

約数和(自身を含む): 40731768

約数和(自身を除く): 21649748

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 15641, 31282, 62564, 78205, 156410, 312820, 954101, 1908202, 3816404, 4770505, 9541010, 19082020]

約数ペア:

[(1, 19082020), (2, 9541010), (4, 4770505), (5, 3816404), (10, 1908202), (20, 954101), (61, 312820), (122, 156410), (244, 78205), (305, 62564), (610, 31282), (1220, 15641)]