138680020

素因数分解:

$2^2\times 5^1\times {\mathrm{1381}}^1\times {\mathrm{5021}}^1$

素因数の和:6411

約数の個数: 24

約数和(自身を含む): 291496968

約数和(自身を除く): 152816948

約数列:

[1, 2, 4, 5, 10, 20, 1381, 2762, 5021, 5524, 6905, 10042, 13810, 20084, 25105, 27620, 50210, 100420, 6934001, 13868002, 27736004, 34670005, 69340010, 138680020]

約数ペア:

[(1, 138680020), (2, 69340010), (4, 34670005), (5, 27736004), (10, 13868002), (20, 6934001), (1381, 100420), (2762, 50210), (5021, 27620), (5524, 25105), (6905, 20084), (10042, 13810)]