20699979

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{619}}^1$

素因数の和:850

約数の個数: 16

約数和(自身を含む): 28212480

約数和(自身を除く): 7512501

約数列:

[1, 3, 71, 157, 213, 471, 619, 1857, 11147, 33441, 43949, 97183, 131847, 291549, 6899993, 20699979]

約数ペア:

[(1, 20699979), (3, 6899993), (71, 291549), (157, 131847), (213, 97183), (471, 43949), (619, 33441), (1857, 11147)]