19802811

素因数分解:

$3^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{1259}}^1$

素因数の和:1383

約数の個数: 24

約数和(自身を含む): 31026240

約数和(自身を除く): 11223429

約数列:

[1, 3, 7, 21, 49, 107, 147, 321, 749, 1259, 2247, 3777, 5243, 8813, 15729, 26439, 61691, 134713, 185073, 404139, 942991, 2828973, 6600937, 19802811]

約数ペア:

[(1, 19802811), (3, 6600937), (7, 2828973), (21, 942991), (49, 404139), (107, 185073), (147, 134713), (321, 61691), (749, 26439), (1259, 15729), (2247, 8813), (3777, 5243)]