21481299

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{977}}^1$

素因数の和:1339

約数の個数: 24

約数和(自身を含む): 35599200

約数和(自身を除く): 14117901

約数列:

[1, 3, 7, 9, 21, 63, 349, 977, 1047, 2443, 2931, 3141, 6839, 7329, 8793, 20517, 21987, 61551, 340973, 1022919, 2386811, 3068757, 7160433, 21481299]

約数ペア:

[(1, 21481299), (3, 7160433), (7, 3068757), (9, 2386811), (21, 1022919), (63, 340973), (349, 61551), (977, 21987), (1047, 20517), (2443, 8793), (2931, 7329), (3141, 6839)]