21075717

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{2153}}^1$

素因数の和:2420

約数の個数: 16

約数和(自身を含む): 30397248

約数和(自身を除く): 9321531

約数列:

[1, 3, 13, 39, 251, 753, 2153, 3263, 6459, 9789, 27989, 83967, 540403, 1621209, 7025239, 21075717]

約数ペア:

[(1, 21075717), (3, 7025239), (13, 1621209), (39, 540403), (251, 83967), (753, 27989), (2153, 9789), (3263, 6459)]