20999995

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{1151}}^1$

素因数の和:1286

約数の個数: 16

約数和(自身を含む): 26127360

約数和(自身を除く): 5127365

約数列:

[1, 5, 41, 89, 205, 445, 1151, 3649, 5755, 18245, 47191, 102439, 235955, 512195, 4199999, 20999995]

約数ペア:

[(1, 20999995), (5, 4199999), (41, 512195), (89, 235955), (205, 102439), (445, 47191), (1151, 18245), (3649, 5755)]