20892815

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{229}}^1\times {\mathrm{257}}^1$

素因数の和:562

約数の個数: 16

約数和(自身を含む): 25634880

約数和(自身を除く): 4742065

約数列:

[1, 5, 71, 229, 257, 355, 1145, 1285, 16259, 18247, 58853, 81295, 91235, 294265, 4178563, 20892815]

約数ペア:

[(1, 20892815), (5, 4178563), (71, 294265), (229, 91235), (257, 81295), (355, 58853), (1145, 18247), (1285, 16259)]