19988367

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{17959}}^1$

素因数の和:18022

約数の個数: 16

約数和(自身を含む): 31034880

約数和(自身を除く): 11046513

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 17959, 53877, 125713, 377139, 951827, 2855481, 6662789, 19988367]

約数ペア:

[(1, 19988367), (3, 6662789), (7, 2855481), (21, 951827), (53, 377139), (159, 125713), (371, 53877), (1113, 17959)]