21027681

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{11287}}^1$

素因数の和:11322

約数の個数: 20

約数和(自身を含む): 32780352

約数和(自身を除く): 11752671

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 11287, 33861, 101583, 259601, 304749, 778803, 914247, 2336409, 7009227, 21027681]

約数ペア:

[(1, 21027681), (3, 7009227), (9, 2336409), (23, 914247), (27, 778803), (69, 304749), (81, 259601), (207, 101583), (621, 33861), (1863, 11287)]