20990085

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19709}}^1$

素因数の和:19788

約数の個数: 16

約数和(自身を含む): 34058880

約数和(自身を除く): 13068795

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19709, 59127, 98545, 295635, 1399339, 4198017, 6996695, 20990085]

約数ペア:

[(1, 20990085), (3, 6996695), (5, 4198017), (15, 1399339), (71, 295635), (213, 98545), (355, 59127), (1065, 19709)]