18937984

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{599}}^1$

素因数の和:645

約数の個数: 64

約数和(自身を含む): 42840000

約数和(自身を除く): 23902016

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 64, 76, 104, 128, 152, 208, 247, 304, 416, 494, 599, 608, 832, 988, 1198, 1216, 1664, 1976, 2396, 2432, 3952, 4792, 7787, 7904, 9584, 11381, 15574, 15808, 19168, 22762, 31148, 31616, 38336, 45524, 62296, 76672, 91048, 124592, 147953, 182096, 249184, 295906, 364192, 498368, 591812, 728384, 996736, 1183624, 1456768, 2367248, 4734496, 9468992, 18937984]

約数ペア:

[(1, 18937984), (2, 9468992), (4, 4734496), (8, 2367248), (13, 1456768), (16, 1183624), (19, 996736), (26, 728384), (32, 591812), (38, 498368), (52, 364192), (64, 295906), (76, 249184), (104, 182096), (128, 147953), (152, 124592), (208, 91048), (247, 76672), (304, 62296), (416, 45524), (494, 38336), (599, 31616), (608, 31148), (832, 22762), (988, 19168), (1198, 15808), (1216, 15574), (1664, 11381), (1976, 9584), (2396, 7904), (2432, 7787), (3952, 4792)]