81787671

素因数分解:

$3^3\times 7^1\times {\mathrm{643}}^1\times {\mathrm{673}}^1$

素因数の和:1332

約数の個数: 32

約数和(自身を含む): 138897920

約数和(自身を除く): 57110249

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 643, 673, 1929, 2019, 4501, 4711, 5787, 6057, 13503, 14133, 17361, 18171, 40509, 42399, 121527, 127197, 432739, 1298217, 3029173, 3894651, 9087519, 11683953, 27262557, 81787671]

約数ペア:

[(1, 81787671), (3, 27262557), (7, 11683953), (9, 9087519), (21, 3894651), (27, 3029173), (63, 1298217), (189, 432739), (643, 127197), (673, 121527), (1929, 42399), (2019, 40509), (4501, 18171), (4711, 17361), (5787, 14133), (6057, 13503)]