19643057

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{691}}^1$

素因数の和:860

約数の個数: 16

約数和(自身を含む): 23384064

約数和(自身を除く): 3741007

約数列:

[1, 7, 31, 131, 217, 691, 917, 4061, 4837, 21421, 28427, 90521, 149947, 633647, 2806151, 19643057]

約数ペア:

[(1, 19643057), (7, 2806151), (31, 633647), (131, 149947), (217, 90521), (691, 28427), (917, 21421), (4061, 4837)]