20309989

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{1249}}^1$

素因数の和:1380

約数の個数: 16

約数和(自身を含む): 24480000

約数和(自身を除く): 4170011

約数列:

[1, 7, 23, 101, 161, 707, 1249, 2323, 8743, 16261, 28727, 126149, 201089, 883043, 2901427, 20309989]

約数ペア:

[(1, 20309989), (7, 2901427), (23, 883043), (101, 201089), (161, 126149), (707, 28727), (1249, 16261), (2323, 8743)]