20505123

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{39971}}^1$

素因数の和:39999

約数の個数: 16

約数和(自身を含む): 31977600

約数和(自身を除く): 11472477

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 39971, 119913, 359739, 759449, 1079217, 2278347, 6835041, 20505123]

約数ペア:

[(1, 20505123), (3, 6835041), (9, 2278347), (19, 1079217), (27, 759449), (57, 359739), (171, 119913), (513, 39971)]