20406891

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{643}}^1$

素因数の和:866

約数の個数: 16

約数和(自身を含む): 27820800

約数和(自身を除く): 7413909

約数列:

[1, 3, 71, 149, 213, 447, 643, 1929, 10579, 31737, 45653, 95807, 136959, 287421, 6802297, 20406891]

約数ペア:

[(1, 20406891), (3, 6802297), (71, 287421), (149, 136959), (213, 95807), (447, 45653), (643, 31737), (1929, 10579)]