21237615

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67421}}^1$

素因数の和:67439

約数の個数: 24

約数和(自身を含む): 42071328

約数和(自身を除く): 20833713

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67421, 202263, 337105, 471947, 606789, 1011315, 1415841, 2359735, 3033945, 4247523, 7079205, 21237615]

約数ペア:

[(1, 21237615), (3, 7079205), (5, 4247523), (7, 3033945), (9, 2359735), (15, 1415841), (21, 1011315), (35, 606789), (45, 471947), (63, 337105), (105, 202263), (315, 67421)]