31561245

素因数分解:

$3^4\times 5^1\times {\mathrm{77929}}^1$

素因数の和:77946

約数の個数: 20

約数和(自身を含む): 56577180

約数和(自身を除く): 25015935

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 77929, 233787, 389645, 701361, 1168935, 2104083, 3506805, 6312249, 10520415, 31561245]

約数ペア:

[(1, 31561245), (3, 10520415), (5, 6312249), (9, 3506805), (15, 2104083), (27, 1168935), (45, 701361), (81, 389645), (135, 233787), (405, 77929)]