21568281

素因数分解:

$3^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{4733}}^1$

素因数の和:4781

約数の個数: 24

約数和(自身を含む): 34539264

約数和(自身を除く): 12970983

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 651, 1519, 4557, 4733, 14199, 33131, 99393, 146723, 231917, 440169, 695751, 1027061, 3081183, 7189427, 21568281]

約数ペア:

[(1, 21568281), (3, 7189427), (7, 3081183), (21, 1027061), (31, 695751), (49, 440169), (93, 231917), (147, 146723), (217, 99393), (651, 33131), (1519, 14199), (4557, 4733)]