81861521

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{233}}^1\times {\mathrm{947}}^1$

素因数の和:1240

約数の個数: 16

約数和(自身を含む): 95831424

約数和(自身を除く): 13969903

約数列:

[1, 7, 53, 233, 371, 947, 1631, 6629, 12349, 50191, 86443, 220651, 351337, 1544557, 11694503, 81861521]

約数ペア:

[(1, 81861521), (7, 11694503), (53, 1544557), (233, 351337), (371, 220651), (947, 86443), (1631, 50191), (6629, 12349)]