21798147

素因数分解:

$3^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 12416253

約数列:

[1, 3, 7, 21, 89, 107, 109, 267, 321, 327, 623, 749, 763, 1869, 2247, 2289, 9523, 9701, 11663, 28569, 29103, 34989, 66661, 67907, 81641, 199983, 203721, 244923, 1038007, 3114021, 7266049, 21798147]

約数ペア:

[(1, 21798147), (3, 7266049), (7, 3114021), (21, 1038007), (89, 244923), (107, 203721), (109, 199983), (267, 81641), (321, 67907), (327, 66661), (623, 34989), (749, 29103), (763, 28569), (1869, 11663), (2247, 9701), (2289, 9523)]