18770128

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:164

約数の個数: 80

約数和(自身を含む): 41997312

約数和(自身を除く): 23227184

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 41, 52, 62, 71, 82, 104, 124, 142, 164, 208, 248, 284, 328, 403, 496, 533, 568, 656, 806, 923, 1066, 1136, 1271, 1612, 1846, 2132, 2201, 2542, 2911, 3224, 3692, 4264, 4402, 5084, 5822, 6448, 7384, 8528, 8804, 10168, 11644, 14768, 16523, 17608, 20336, 23288, 28613, 33046, 35216, 37843, 46576, 57226, 66092, 75686, 90241, 114452, 132184, 151372, 180482, 228904, 264368, 302744, 360964, 457808, 605488, 721928, 1173133, 1443856, 2346266, 4692532, 9385064, 18770128]

約数ペア:

[(1, 18770128), (2, 9385064), (4, 4692532), (8, 2346266), (13, 1443856), (16, 1173133), (26, 721928), (31, 605488), (41, 457808), (52, 360964), (62, 302744), (71, 264368), (82, 228904), (104, 180482), (124, 151372), (142, 132184), (164, 114452), (208, 90241), (248, 75686), (284, 66092), (328, 57226), (403, 46576), (496, 37843), (533, 35216), (568, 33046), (656, 28613), (806, 23288), (923, 20336), (1066, 17608), (1136, 16523), (1271, 14768), (1612, 11644), (1846, 10168), (2132, 8804), (2201, 8528), (2542, 7384), (2911, 6448), (3224, 5822), (3692, 5084), (4264, 4402)]