20009457

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{523}}^1$

素因数の和:654

約数の個数: 32

約数和(自身を含む): 32278400

約数和(自身を除く): 12268943

約数列:

[1, 3, 9, 13, 27, 39, 109, 117, 327, 351, 523, 981, 1417, 1569, 2943, 4251, 4707, 6799, 12753, 14121, 20397, 38259, 57007, 61191, 171021, 183573, 513063, 741091, 1539189, 2223273, 6669819, 20009457]

約数ペア:

[(1, 20009457), (3, 6669819), (9, 2223273), (13, 1539189), (27, 741091), (39, 513063), (109, 183573), (117, 171021), (327, 61191), (351, 57007), (523, 38259), (981, 20397), (1417, 14121), (1569, 12753), (2943, 6799), (4251, 4707)]