81081405

素因数分解:

$3^4\times 5^1\times {\mathrm{200201}}^1$

素因数の和:200218

約数の個数: 20

約数和(自身を含む): 145346652

約数和(自身を除く): 64265247

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 200201, 600603, 1001005, 1801809, 3003015, 5405427, 9009045, 16216281, 27027135, 81081405]

約数ペア:

[(1, 81081405), (3, 27027135), (5, 16216281), (9, 9009045), (15, 5405427), (27, 3003015), (45, 1801809), (81, 1001005), (135, 600603), (405, 200201)]