247978017

素因数分解:

$3^4\times 7^1\times {\mathrm{437351}}^1$

素因数の和:437370

約数の個数: 20

約数和(自身を含む): 423356736

約数和(自身を除く): 175378719

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 437351, 1312053, 3061457, 3936159, 9184371, 11808477, 27553113, 35425431, 82659339, 247978017]

約数ペア:

[(1, 247978017), (3, 82659339), (7, 35425431), (9, 27553113), (21, 11808477), (27, 9184371), (63, 3936159), (81, 3061457), (189, 1312053), (567, 437351)]