20784879

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{617}}^1$

素因数の和:839

約数の個数: 24

約数和(自身を含む): 31814640

約数和(自身を除く): 11029761

約数列:

[1, 3, 9, 19, 57, 171, 197, 591, 617, 1773, 1851, 3743, 5553, 11229, 11723, 33687, 35169, 105507, 121549, 364647, 1093941, 2309431, 6928293, 20784879]

約数ペア:

[(1, 20784879), (3, 6928293), (9, 2309431), (19, 1093941), (57, 364647), (171, 121549), (197, 105507), (591, 35169), (617, 33687), (1773, 11723), (1851, 11229), (3743, 5553)]