21209421

素因数分解:

$3^1\times {\mathrm{17}}^3\times {\mathrm{1439}}^1$

素因数の和:1493

約数の個数: 16

約数和(自身を含む): 30067200

約数和(自身を除く): 8857779

約数列:

[1, 3, 17, 51, 289, 867, 1439, 4317, 4913, 14739, 24463, 73389, 415871, 1247613, 7069807, 21209421]

約数ペア:

[(1, 21209421), (3, 7069807), (17, 1247613), (51, 415871), (289, 73389), (867, 24463), (1439, 14739), (4317, 4913)]