16191681

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 24624000

約数和(自身を除く): 8432319

約数列:

[1, 3, 11, 33, 37, 89, 111, 149, 267, 407, 447, 979, 1221, 1639, 2937, 3293, 4917, 5513, 9879, 13261, 16539, 36223, 39783, 60643, 108669, 145871, 181929, 437613, 490657, 1471971, 5397227, 16191681]

約数ペア:

[(1, 16191681), (3, 5397227), (11, 1471971), (33, 490657), (37, 437613), (89, 181929), (111, 145871), (149, 108669), (267, 60643), (407, 39783), (447, 36223), (979, 16539), (1221, 13261), (1639, 9879), (2937, 5513), (3293, 4917)]