20654320

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15187}}^1$

素因数の和:15217

約数の個数: 40

約数和(自身を含む): 50849424

約数和(自身を除く): 30195104

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15187, 30374, 60748, 75935, 121496, 151870, 242992, 258179, 303740, 516358, 607480, 1032716, 1214960, 1290895, 2065432, 2581790, 4130864, 5163580, 10327160, 20654320]

約数ペア:

[(1, 20654320), (2, 10327160), (4, 5163580), (5, 4130864), (8, 2581790), (10, 2065432), (16, 1290895), (17, 1214960), (20, 1032716), (34, 607480), (40, 516358), (68, 303740), (80, 258179), (85, 242992), (136, 151870), (170, 121496), (272, 75935), (340, 60748), (680, 30374), (1360, 15187)]