28564820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{179}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 61689600

約数和(自身を除く): 33124780

約数列:

[1, 2, 4, 5, 10, 20, 79, 101, 158, 179, 202, 316, 358, 395, 404, 505, 716, 790, 895, 1010, 1580, 1790, 2020, 3580, 7979, 14141, 15958, 18079, 28282, 31916, 36158, 39895, 56564, 70705, 72316, 79790, 90395, 141410, 159580, 180790, 282820, 361580, 1428241, 2856482, 5712964, 7141205, 14282410, 28564820]

約数ペア:

[(1, 28564820), (2, 14282410), (4, 7141205), (5, 5712964), (10, 2856482), (20, 1428241), (79, 361580), (101, 282820), (158, 180790), (179, 159580), (202, 141410), (316, 90395), (358, 79790), (395, 72316), (404, 70705), (505, 56564), (716, 39895), (790, 36158), (895, 31916), (1010, 28282), (1580, 18079), (1790, 15958), (2020, 14141), (3580, 7979)]