20990319

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{24379}}^1$

素因数の和:24430

約数の個数: 16

約数和(自身を含む): 32766720

約数和(自身を除く): 11776401

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 24379, 73137, 170653, 511959, 999539, 2998617, 6996773, 20990319]

約数ペア:

[(1, 20990319), (3, 6996773), (7, 2998617), (21, 999539), (41, 511959), (123, 170653), (287, 73137), (861, 24379)]