21078765

素因数分解:

$3^3\times 5^1\times {\mathrm{156139}}^1$

素因数の和:156153

約数の個数: 16

約数和(自身を含む): 37473600

約数和(自身を除く): 16394835

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 156139, 468417, 780695, 1405251, 2342085, 4215753, 7026255, 21078765]

約数ペア:

[(1, 21078765), (3, 7026255), (5, 4215753), (9, 2342085), (15, 1405251), (27, 780695), (45, 468417), (135, 156139)]