81405

素因数分解:

$3^5\times 5^1\times {\mathrm{67}}^1$

素因数の和:87

約数の個数: 24

約数和(自身を含む): 148512

約数和(自身を除く): 67107

約数列:

[1, 3, 5, 9, 15, 27, 45, 67, 81, 135, 201, 243, 335, 405, 603, 1005, 1215, 1809, 3015, 5427, 9045, 16281, 27135, 81405]

約数ペア:

[(1, 81405), (3, 27135), (5, 16281), (9, 9045), (15, 5427), (27, 3015), (45, 1809), (67, 1215), (81, 1005), (135, 603), (201, 405), (243, 335)]