21691439

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{227}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 29154816

約数和(自身を除く): 7463377

約数列:

[1, 7, 11, 17, 73, 77, 119, 187, 227, 511, 803, 1241, 1309, 1589, 2497, 3859, 5621, 8687, 13651, 16571, 17479, 27013, 42449, 95557, 115997, 182281, 281707, 297143, 1275967, 1971949, 3098777, 21691439]

約数ペア:

[(1, 21691439), (7, 3098777), (11, 1971949), (17, 1275967), (73, 297143), (77, 281707), (119, 182281), (187, 115997), (227, 95557), (511, 42449), (803, 27013), (1241, 17479), (1309, 16571), (1589, 13651), (2497, 8687), (3859, 5621)]