12321981

素因数分解:

$3^2\times 7^2\times {\mathrm{27941}}^1$

素因数の和:27961

約数の個数: 18

約数和(自身を含む): 20705022

約数和(自身を除く): 8383041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 27941, 83823, 195587, 251469, 586761, 1369109, 1760283, 4107327, 12321981]

約数ペア:

[(1, 12321981), (3, 4107327), (7, 1760283), (9, 1369109), (21, 586761), (49, 251469), (63, 195587), (147, 83823), (441, 27941)]