21680855

素因数分解:

$5^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{1217}}^1$

素因数の和:1738

約数の個数: 16

約数和(自身を含む): 29816640

約数和(自身を除く): 8135785

約数列:

[1, 5, 7, 35, 509, 1217, 2545, 3563, 6085, 8519, 17815, 42595, 619453, 3097265, 4336171, 21680855]

約数ペア:

[(1, 21680855), (5, 4336171), (7, 3097265), (35, 619453), (509, 42595), (1217, 17815), (2545, 8519), (3563, 6085)]