81218943

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{563}}^1$

素因数の和:725

約数の個数: 40

約数和(自身を含む): 131847408

約数和(自身を除く): 50628465

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 137, 351, 411, 563, 1053, 1233, 1689, 1781, 3699, 5067, 5343, 7319, 11097, 15201, 16029, 21957, 45603, 48087, 65871, 77131, 144261, 197613, 231393, 592839, 694179, 1002703, 2082537, 3008109, 6247611, 9024327, 27072981, 81218943]

約数ペア:

[(1, 81218943), (3, 27072981), (9, 9024327), (13, 6247611), (27, 3008109), (39, 2082537), (81, 1002703), (117, 694179), (137, 592839), (351, 231393), (411, 197613), (563, 144261), (1053, 77131), (1233, 65871), (1689, 48087), (1781, 45603), (3699, 21957), (5067, 16029), (5343, 15201), (7319, 11097)]