20813445

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{389}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 38329200

約数和(自身を除く): 17515755

約数列:

[1, 3, 5, 9, 15, 29, 41, 45, 87, 123, 145, 205, 261, 369, 389, 435, 615, 1167, 1189, 1305, 1845, 1945, 3501, 3567, 5835, 5945, 10701, 11281, 15949, 17505, 17835, 33843, 47847, 53505, 56405, 79745, 101529, 143541, 169215, 239235, 462521, 507645, 717705, 1387563, 2312605, 4162689, 6937815, 20813445]

約数ペア:

[(1, 20813445), (3, 6937815), (5, 4162689), (9, 2312605), (15, 1387563), (29, 717705), (41, 507645), (45, 462521), (87, 239235), (123, 169215), (145, 143541), (205, 101529), (261, 79745), (369, 56405), (389, 53505), (435, 47847), (615, 33843), (1167, 17835), (1189, 17505), (1305, 15949), (1845, 11281), (1945, 10701), (3501, 5945), (3567, 5835)]