1215405

素因数分解:

$3^4\times 5^1\times {\mathrm{3001}}^1$

素因数の和:3018

約数の個数: 20

約数和(自身を含む): 2179452

約数和(自身を除く): 964047

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 3001, 9003, 15005, 27009, 45015, 81027, 135045, 243081, 405135, 1215405]

約数ペア:

[(1, 1215405), (3, 405135), (5, 243081), (9, 135045), (15, 81027), (27, 45015), (45, 27009), (81, 15005), (135, 9003), (405, 3001)]