28217973

素因数分解:

$3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{1381}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 44113440

約数和(自身を除く): 15895467

約数列:

[1, 3, 7, 21, 49, 139, 147, 417, 973, 1381, 2919, 4143, 6811, 9667, 20433, 29001, 67669, 191959, 203007, 575877, 1343713, 4031139, 9405991, 28217973]

約数ペア:

[(1, 28217973), (3, 9405991), (7, 4031139), (21, 1343713), (49, 575877), (139, 203007), (147, 191959), (417, 67669), (973, 29001), (1381, 20433), (2919, 9667), (4143, 6811)]