21378891

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{3733}}^1$

素因数の和:3842

約数の個数: 16

約数和(自身を含む): 30110976

約数和(自身を除く): 8732085

約数列:

[1, 3, 23, 69, 83, 249, 1909, 3733, 5727, 11199, 85859, 257577, 309839, 929517, 7126297, 21378891]

約数ペア:

[(1, 21378891), (3, 7126297), (23, 929517), (69, 309839), (83, 257577), (249, 85859), (1909, 11199), (3733, 5727)]