20689389

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4157}}^1$

素因数の和:4249

約数の個数: 24

約数和(自身を含む): 34594560

約数和(自身を除く): 13905171

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4157, 4977, 12471, 29099, 37413, 87297, 261891, 328403, 985209, 2298821, 2955627, 6896463, 20689389]

約数ペア:

[(1, 20689389), (3, 6896463), (7, 2955627), (9, 2298821), (21, 985209), (63, 328403), (79, 261891), (237, 87297), (553, 37413), (711, 29099), (1659, 12471), (4157, 4977)]