20811921

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{2393}}^1$

素因数の和:2632

約数の個数: 16

約数和(自身を含む): 30030336

約数和(自身を除く): 9218415

約数列:

[1, 3, 13, 39, 223, 669, 2393, 2899, 7179, 8697, 31109, 93327, 533639, 1600917, 6937307, 20811921]

約数ペア:

[(1, 20811921), (3, 6937307), (13, 1600917), (39, 533639), (223, 93327), (669, 31109), (2393, 8697), (2899, 7179)]