19997016

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{599}}^1$

素因数の和:728

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 34434984

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 107, 156, 214, 312, 321, 428, 599, 642, 856, 1198, 1284, 1391, 1797, 2396, 2568, 2782, 3594, 4173, 4792, 5564, 7188, 7787, 8346, 11128, 14376, 15574, 16692, 23361, 31148, 33384, 46722, 62296, 64093, 93444, 128186, 186888, 192279, 256372, 384558, 512744, 769116, 833209, 1538232, 1666418, 2499627, 3332836, 4999254, 6665672, 9998508, 19997016]

約数ペア:

[(1, 19997016), (2, 9998508), (3, 6665672), (4, 4999254), (6, 3332836), (8, 2499627), (12, 1666418), (13, 1538232), (24, 833209), (26, 769116), (39, 512744), (52, 384558), (78, 256372), (104, 192279), (107, 186888), (156, 128186), (214, 93444), (312, 64093), (321, 62296), (428, 46722), (599, 33384), (642, 31148), (856, 23361), (1198, 16692), (1284, 15574), (1391, 14376), (1797, 11128), (2396, 8346), (2568, 7787), (2782, 7188), (3594, 5564), (4173, 4792)]