20874568

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:358

約数の個数: 64

約数和(自身を含む): 46811520

約数和(自身を除く): 25936952

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 71, 88, 104, 142, 143, 257, 284, 286, 514, 568, 572, 781, 923, 1028, 1144, 1562, 1846, 2056, 2827, 3124, 3341, 3692, 5654, 6248, 6682, 7384, 10153, 11308, 13364, 18247, 20306, 22616, 26728, 36494, 36751, 40612, 72988, 73502, 81224, 145976, 147004, 200717, 237211, 294008, 401434, 474422, 802868, 948844, 1605736, 1897688, 2609321, 5218642, 10437284, 20874568]

約数ペア:

[(1, 20874568), (2, 10437284), (4, 5218642), (8, 2609321), (11, 1897688), (13, 1605736), (22, 948844), (26, 802868), (44, 474422), (52, 401434), (71, 294008), (88, 237211), (104, 200717), (142, 147004), (143, 145976), (257, 81224), (284, 73502), (286, 72988), (514, 40612), (568, 36751), (572, 36494), (781, 26728), (923, 22616), (1028, 20306), (1144, 18247), (1562, 13364), (1846, 11308), (2056, 10153), (2827, 7384), (3124, 6682), (3341, 6248), (3692, 5654)]