21892221

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{643}}^1$

素因数の和:762

約数の個数: 32

約数和(自身を含む): 35342720

約数和(自身を除く): 13450499

約数列:

[1, 3, 9, 13, 27, 39, 97, 117, 291, 351, 643, 873, 1261, 1929, 2619, 3783, 5787, 8359, 11349, 17361, 25077, 34047, 62371, 75231, 187113, 225693, 561339, 810823, 1684017, 2432469, 7297407, 21892221]

約数ペア:

[(1, 21892221), (3, 7297407), (9, 2432469), (13, 1684017), (27, 810823), (39, 561339), (97, 225693), (117, 187113), (291, 75231), (351, 62371), (643, 34047), (873, 25077), (1261, 17361), (1929, 11349), (2619, 8359), (3783, 5787)]