19777581

素因数分解:

$3^3\times {\mathrm{331}}^1\times {\mathrm{2213}}^1$

素因数の和:2553

約数の個数: 16

約数和(自身を含む): 29401920

約数和(自身を除く): 9624339

約数列:

[1, 3, 9, 27, 331, 993, 2213, 2979, 6639, 8937, 19917, 59751, 732503, 2197509, 6592527, 19777581]

約数ペア:

[(1, 19777581), (3, 6592527), (9, 2197509), (27, 732503), (331, 59751), (993, 19917), (2213, 8937), (2979, 6639)]