20120805

素因数分解:

$3^4\times 5^1\times {\mathrm{49681}}^1$

素因数の和:49698

約数の個数: 20

約数和(自身を含む): 36069132

約数和(自身を除く): 15948327

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49681, 149043, 248405, 447129, 745215, 1341387, 2235645, 4024161, 6706935, 20120805]

約数ペア:

[(1, 20120805), (3, 6706935), (5, 4024161), (9, 2235645), (15, 1341387), (27, 745215), (45, 447129), (81, 248405), (135, 149043), (405, 49681)]