21226779

素因数分解:

$3^5\times 7^1\times {\mathrm{12479}}^1$

素因数の和:12501

約数の個数: 24

約数和(自身を含む): 36341760

約数和(自身を除く): 15114981

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12479, 37437, 87353, 112311, 262059, 336933, 786177, 1010799, 2358531, 3032397, 7075593, 21226779]

約数ペア:

[(1, 21226779), (3, 7075593), (7, 3032397), (9, 2358531), (21, 1010799), (27, 786177), (63, 336933), (81, 262059), (189, 112311), (243, 87353), (567, 37437), (1701, 12479)]