81880239

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{1559}}^1$

素因数の和:1671

約数の個数: 32

約数和(自身を含む): 129991680

約数和(自身を除く): 48111441

約数列:

[1, 3, 7, 21, 41, 61, 123, 183, 287, 427, 861, 1281, 1559, 2501, 4677, 7503, 10913, 17507, 32739, 52521, 63919, 95099, 191757, 285297, 447433, 665693, 1342299, 1997079, 3899059, 11697177, 27293413, 81880239]

約数ペア:

[(1, 81880239), (3, 27293413), (7, 11697177), (21, 3899059), (41, 1997079), (61, 1342299), (123, 665693), (183, 447433), (287, 285297), (427, 191757), (861, 95099), (1281, 63919), (1559, 52521), (2501, 32739), (4677, 17507), (7503, 10913)]