1217391

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1999}}^1$

素因数の和:2038

約数の個数: 16

約数和(自身を含む): 1920000

約数和(自身を除く): 702609

約数列:

[1, 3, 7, 21, 29, 87, 203, 609, 1999, 5997, 13993, 41979, 57971, 173913, 405797, 1217391]

約数ペア:

[(1, 1217391), (3, 405797), (7, 173913), (21, 57971), (29, 41979), (87, 13993), (203, 5997), (609, 1999)]