20688047315

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1\times {\mathrm{53197}}^1$

素因数の和:53439

約数の個数: 32

約数和(自身を含む): 27741267456

約数和(自身を除く): 7053220141

約数列:

[1, 5, 13, 31, 65, 155, 193, 403, 965, 2015, 2509, 5983, 12545, 29915, 53197, 77779, 265985, 388895, 691561, 1649107, 3457805, 8245535, 10267021, 21438391, 51335105, 107191955, 133471273, 318277651, 667356365, 1591388255, 4137609463, 20688047315]

約数ペア:

[(1, 20688047315), (5, 4137609463), (13, 1591388255), (31, 667356365), (65, 318277651), (155, 133471273), (193, 107191955), (403, 51335105), (965, 21438391), (2015, 10267021), (2509, 8245535), (5983, 3457805), (12545, 1649107), (29915, 691561), (53197, 388895), (77779, 265985)]