81254257

素因数分解:

$7^1\times {\mathrm{37}}^2\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:281

約数の個数: 24

約数和(自身を含む): 97702080

約数和(自身を除く): 16447823

約数列:

[1, 7, 37, 61, 139, 259, 427, 973, 1369, 2257, 5143, 8479, 9583, 15799, 36001, 59353, 83509, 190291, 313723, 584563, 1332037, 2196061, 11607751, 81254257]

約数ペア:

[(1, 81254257), (7, 11607751), (37, 2196061), (61, 1332037), (139, 584563), (259, 313723), (427, 190291), (973, 83509), (1369, 59353), (2257, 36001), (5143, 15799), (8479, 9583)]