201992020

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{139}}^1\times {\mathrm{643}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 431686080

約数和(自身を除く): 229694060

約数列:

[1, 2, 4, 5, 10, 20, 113, 139, 226, 278, 452, 556, 565, 643, 695, 1130, 1286, 1390, 2260, 2572, 2780, 3215, 6430, 12860, 15707, 31414, 62828, 72659, 78535, 89377, 145318, 157070, 178754, 290636, 314140, 357508, 363295, 446885, 726590, 893770, 1453180, 1787540, 10099601, 20199202, 40398404, 50498005, 100996010, 201992020]

約数ペア:

[(1, 201992020), (2, 100996010), (4, 50498005), (5, 40398404), (10, 20199202), (20, 10099601), (113, 1787540), (139, 1453180), (226, 893770), (278, 726590), (452, 446885), (556, 363295), (565, 357508), (643, 314140), (695, 290636), (1130, 178754), (1286, 157070), (1390, 145318), (2260, 89377), (2572, 78535), (2780, 72659), (3215, 62828), (6430, 31414), (12860, 15707)]