21168381

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{17509}}^1$

素因数の和:17556

約数の個数: 16

約数和(自身を含む): 31377920

約数和(自身を除く): 10209539

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 17509, 52527, 227617, 542779, 682851, 1628337, 7056127, 21168381]

約数ペア:

[(1, 21168381), (3, 7056127), (13, 1628337), (31, 682851), (39, 542779), (93, 227617), (403, 52527), (1209, 17509)]