21842020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1\times {\mathrm{251}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 48686400

約数和(自身を除く): 26844380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 229, 251, 380, 458, 502, 916, 1004, 1145, 1255, 2290, 2510, 4351, 4580, 4769, 5020, 8702, 9538, 17404, 19076, 21755, 23845, 43510, 47690, 57479, 87020, 95380, 114958, 229916, 287395, 574790, 1092101, 1149580, 2184202, 4368404, 5460505, 10921010, 21842020]

約数ペア:

[(1, 21842020), (2, 10921010), (4, 5460505), (5, 4368404), (10, 2184202), (19, 1149580), (20, 1092101), (38, 574790), (76, 287395), (95, 229916), (190, 114958), (229, 95380), (251, 87020), (380, 57479), (458, 47690), (502, 43510), (916, 23845), (1004, 21755), (1145, 19076), (1255, 17404), (2290, 9538), (2510, 8702), (4351, 5020), (4580, 4769)]