20980215

素因数分解:

$3^4\times 5^1\times {\mathrm{51803}}^1$

素因数の和:51820

約数の個数: 20

約数和(自身を含む): 37609704

約数和(自身を除く): 16629489

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51803, 155409, 259015, 466227, 777045, 1398681, 2331135, 4196043, 6993405, 20980215]

約数ペア:

[(1, 20980215), (3, 6993405), (5, 4196043), (9, 2331135), (15, 1398681), (27, 777045), (45, 466227), (81, 259015), (135, 155409), (405, 51803)]