398232020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1047979}}^1$

素因数の和:1048007

約数の個数: 24

約数和(自身を含む): 880303200

約数和(自身を除く): 482071180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 1047979, 2095958, 4191916, 5239895, 10479790, 19911601, 20959580, 39823202, 79646404, 99558005, 199116010, 398232020]

約数ペア:

[(1, 398232020), (2, 199116010), (4, 99558005), (5, 79646404), (10, 39823202), (19, 20959580), (20, 19911601), (38, 10479790), (76, 5239895), (95, 4191916), (190, 2095958), (380, 1047979)]