20642445

素因数分解:

$3^4\times 5^1\times {\mathrm{50969}}^1$

素因数の和:50986

約数の個数: 20

約数和(自身を含む): 37004220

約数和(自身を除く): 16361775

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 50969, 152907, 254845, 458721, 764535, 1376163, 2293605, 4128489, 6880815, 20642445]

約数ペア:

[(1, 20642445), (3, 6880815), (5, 4128489), (9, 2293605), (15, 1376163), (27, 764535), (45, 458721), (81, 254845), (135, 152907), (405, 50969)]