21012777

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{11279}}^1$

素因数の和:11314

約数の個数: 20

約数和(自身を含む): 32757120

約数和(自身を除く): 11744343

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 11279, 33837, 101511, 259417, 304533, 778251, 913599, 2334753, 7004259, 21012777]

約数ペア:

[(1, 21012777), (3, 7004259), (9, 2334753), (23, 913599), (27, 778251), (69, 304533), (81, 259417), (207, 101511), (621, 33837), (1863, 11279)]