18860989

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{3779}}^1$

素因数の和:3840

約数の個数: 16

約数和(自身を含む): 23224320

約数和(自身を除く): 4363331

約数列:

[1, 7, 23, 31, 161, 217, 713, 3779, 4991, 26453, 86917, 117149, 608419, 820043, 2694427, 18860989]

約数ペア:

[(1, 18860989), (7, 2694427), (23, 820043), (31, 608419), (161, 117149), (217, 86917), (713, 26453), (3779, 4991)]