21080913

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 33116160

約数和(自身を除く): 12035247

約数列:

[1, 3, 7, 21, 79, 97, 131, 237, 291, 393, 553, 679, 917, 1659, 2037, 2751, 7663, 10349, 12707, 22989, 31047, 38121, 53641, 72443, 88949, 160923, 217329, 266847, 1003853, 3011559, 7026971, 21080913]

約数ペア:

[(1, 21080913), (3, 7026971), (7, 3011559), (21, 1003853), (79, 266847), (97, 217329), (131, 160923), (237, 88949), (291, 72443), (393, 53641), (553, 38121), (679, 31047), (917, 22989), (1659, 12707), (2037, 10349), (2751, 7663)]