81307317

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{271}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 137179392

約数和(自身を除く): 55872075

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 157, 271, 273, 471, 637, 813, 1099, 1897, 1911, 2041, 3297, 3523, 5691, 6123, 7693, 10569, 13279, 14287, 23079, 24661, 39837, 42547, 42861, 73983, 100009, 127641, 172627, 297829, 300027, 517881, 553111, 893487, 1659333, 2084803, 3871777, 6254409, 11615331, 27102439, 81307317]

約数ペア:

[(1, 81307317), (3, 27102439), (7, 11615331), (13, 6254409), (21, 3871777), (39, 2084803), (49, 1659333), (91, 893487), (147, 553111), (157, 517881), (271, 300027), (273, 297829), (471, 172627), (637, 127641), (813, 100009), (1099, 73983), (1897, 42861), (1911, 42547), (2041, 39837), (3297, 24661), (3523, 23079), (5691, 14287), (6123, 13279), (7693, 10569)]