28790216

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{557}}^1$

素因数の和:654

約数の個数: 64

約数和(自身を含む): 67495680

約数和(自身を除く): 38705464

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 71, 91, 104, 142, 182, 284, 364, 497, 557, 568, 728, 923, 994, 1114, 1846, 1988, 2228, 3692, 3899, 3976, 4456, 6461, 7241, 7384, 7798, 12922, 14482, 15596, 25844, 28964, 31192, 39547, 50687, 51688, 57928, 79094, 101374, 158188, 202748, 276829, 316376, 405496, 514111, 553658, 1028222, 1107316, 2056444, 2214632, 3598777, 4112888, 7197554, 14395108, 28790216]

約数ペア:

[(1, 28790216), (2, 14395108), (4, 7197554), (7, 4112888), (8, 3598777), (13, 2214632), (14, 2056444), (26, 1107316), (28, 1028222), (52, 553658), (56, 514111), (71, 405496), (91, 316376), (104, 276829), (142, 202748), (182, 158188), (284, 101374), (364, 79094), (497, 57928), (557, 51688), (568, 50687), (728, 39547), (923, 31192), (994, 28964), (1114, 25844), (1846, 15596), (1988, 14482), (2228, 12922), (3692, 7798), (3899, 7384), (3976, 7241), (4456, 6461)]