81996551

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:149

約数の個数: 40

約数和(自身を含む): 107289504

約数和(自身を除く): 25292953

約数列:

[1, 7, 13, 37, 49, 71, 91, 259, 343, 481, 497, 637, 923, 1813, 2401, 2627, 3367, 3479, 4459, 6461, 12691, 18389, 23569, 24353, 31213, 34151, 45227, 88837, 128723, 164983, 170471, 239057, 316589, 901061, 1154881, 1673399, 2216123, 6307427, 11713793, 81996551]

約数ペア:

[(1, 81996551), (7, 11713793), (13, 6307427), (37, 2216123), (49, 1673399), (71, 1154881), (91, 901061), (259, 316589), (343, 239057), (481, 170471), (497, 164983), (637, 128723), (923, 88837), (1813, 45227), (2401, 34151), (2627, 31213), (3367, 24353), (3479, 23569), (4459, 18389), (6461, 12691)]