81020331

素因数分解:

$3^6\times 7^1\times {\mathrm{15877}}^1$

素因数の和:15902

約数の個数: 28

約数和(自身を含む): 138837232

約数和(自身を除く): 57816901

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 5103, 15877, 47631, 111139, 142893, 333417, 428679, 1000251, 1286037, 3000753, 3858111, 9002259, 11574333, 27006777, 81020331]

約数ペア:

[(1, 81020331), (3, 27006777), (7, 11574333), (9, 9002259), (21, 3858111), (27, 3000753), (63, 1286037), (81, 1000251), (189, 428679), (243, 333417), (567, 142893), (729, 111139), (1701, 47631), (5103, 15877)]