20915740

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1109}}^1$

素因数の和:1182

約数の個数: 48

約数和(自身を含む): 46992960

約数和(自身を除く): 26077220

約数列:

[1, 2, 4, 5, 10, 20, 23, 41, 46, 82, 92, 115, 164, 205, 230, 410, 460, 820, 943, 1109, 1886, 2218, 3772, 4436, 4715, 5545, 9430, 11090, 18860, 22180, 25507, 45469, 51014, 90938, 102028, 127535, 181876, 227345, 255070, 454690, 510140, 909380, 1045787, 2091574, 4183148, 5228935, 10457870, 20915740]

約数ペア:

[(1, 20915740), (2, 10457870), (4, 5228935), (5, 4183148), (10, 2091574), (20, 1045787), (23, 909380), (41, 510140), (46, 454690), (82, 255070), (92, 227345), (115, 181876), (164, 127535), (205, 102028), (230, 90938), (410, 51014), (460, 45469), (820, 25507), (943, 22180), (1109, 18860), (1886, 11090), (2218, 9430), (3772, 5545), (4436, 4715)]