20897121

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{7159}}^1$

素因数の和:7308

約数の個数: 16

約数和(自身を含む): 32076800

約数和(自身を除く): 11179679

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 7159, 21477, 50113, 150339, 995101, 2985303, 6965707, 20897121]

約数ペア:

[(1, 20897121), (3, 6965707), (7, 2985303), (21, 995101), (139, 150339), (417, 50113), (973, 21477), (2919, 7159)]