80664040

素因数分解:

$2^3\times 5^1\times {\mathrm{1019}}^1\times {\mathrm{1979}}^1$

素因数の和:3009

約数の個数: 32

約数和(自身を含む): 181764000

約数和(自身を除く): 101099960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1019, 1979, 2038, 3958, 4076, 5095, 7916, 8152, 9895, 10190, 15832, 19790, 20380, 39580, 40760, 79160, 2016601, 4033202, 8066404, 10083005, 16132808, 20166010, 40332020, 80664040]

約数ペア:

[(1, 80664040), (2, 40332020), (4, 20166010), (5, 16132808), (8, 10083005), (10, 8066404), (20, 4033202), (40, 2016601), (1019, 79160), (1979, 40760), (2038, 39580), (3958, 20380), (4076, 19790), (5095, 15832), (7916, 10190), (8152, 9895)]