81538709

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:873

約数の個数: 24

約数和(自身を含む): 100876608

約数和(自身を除く): 19337899

約数列:

[1, 7, 19, 41, 133, 287, 361, 779, 787, 2527, 5453, 5509, 14801, 14953, 32267, 103607, 104671, 225869, 284107, 613073, 1988749, 4291511, 11648387, 81538709]

約数ペア:

[(1, 81538709), (7, 11648387), (19, 4291511), (41, 1988749), (133, 613073), (287, 284107), (361, 225869), (779, 104671), (787, 103607), (2527, 32267), (5453, 14953), (5509, 14801)]