20978565

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73609}}^1$

素因数の和:73636

約数の個数: 16

約数和(自身を含む): 35332800

約数和(自身を除く): 14354235

約数列:

[1, 3, 5, 15, 19, 57, 95, 285, 73609, 220827, 368045, 1104135, 1398571, 4195713, 6992855, 20978565]

約数ペア:

[(1, 20978565), (3, 6992855), (5, 4195713), (15, 1398571), (19, 1104135), (57, 368045), (95, 220827), (285, 73609)]