8457740

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 18506880

約数和(自身を除く): 10049140

約数列:

[1, 2, 4, 5, 10, 20, 53, 79, 101, 106, 158, 202, 212, 265, 316, 395, 404, 505, 530, 790, 1010, 1060, 1580, 2020, 4187, 5353, 7979, 8374, 10706, 15958, 16748, 20935, 21412, 26765, 31916, 39895, 41870, 53530, 79790, 83740, 107060, 159580, 422887, 845774, 1691548, 2114435, 4228870, 8457740]

約数ペア:

[(1, 8457740), (2, 4228870), (4, 2114435), (5, 1691548), (10, 845774), (20, 422887), (53, 159580), (79, 107060), (101, 83740), (106, 79790), (158, 53530), (202, 41870), (212, 39895), (265, 31916), (316, 26765), (395, 21412), (404, 20935), (505, 16748), (530, 15958), (790, 10706), (1010, 8374), (1060, 7979), (1580, 5353), (2020, 4187)]