21645309

素因数分解:

$3^1\times 7^2\times {\mathrm{229}}^1\times {\mathrm{643}}^1$

素因数の和:889

約数の個数: 24

約数和(自身を含む): 33771360

約数和(自身を除く): 12126051

約数列:

[1, 3, 7, 21, 49, 147, 229, 643, 687, 1603, 1929, 4501, 4809, 11221, 13503, 31507, 33663, 94521, 147247, 441741, 1030729, 3092187, 7215103, 21645309]

約数ペア:

[(1, 21645309), (3, 7215103), (7, 3092187), (21, 1030729), (49, 441741), (147, 147247), (229, 94521), (643, 33663), (687, 31507), (1603, 13503), (1929, 11221), (4501, 4809)]