21019453

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12157}}^1$

素因数の和:12196

約数の個数: 16

約数和(自身を含む): 27233920

約数和(自身を除く): 6214467

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12157, 85099, 158041, 230983, 1106287, 1616881, 3002779, 21019453]

約数ペア:

[(1, 21019453), (7, 3002779), (13, 1616881), (19, 1106287), (91, 230983), (133, 158041), (247, 85099), (1729, 12157)]