21030121

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{487}}^1$

素因数の和:724

約数の個数: 16

約数和(自身を含む): 24985600

約数和(自身を除く): 3955479

約数列:

[1, 7, 31, 199, 217, 487, 1393, 3409, 6169, 15097, 43183, 96913, 105679, 678391, 3004303, 21030121]

約数ペア:

[(1, 21030121), (7, 3004303), (31, 678391), (199, 105679), (217, 96913), (487, 43183), (1393, 15097), (3409, 6169)]