18550720

素因数分解:

$2^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1999}}^1$

素因数の和:2045

約数の個数: 56

約数和(自身を含む): 45720000

約数和(自身を除く): 27169280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 145, 160, 232, 290, 320, 464, 580, 928, 1160, 1856, 1999, 2320, 3998, 4640, 7996, 9280, 9995, 15992, 19990, 31984, 39980, 57971, 63968, 79960, 115942, 127936, 159920, 231884, 289855, 319840, 463768, 579710, 639680, 927536, 1159420, 1855072, 2318840, 3710144, 4637680, 9275360, 18550720]

約数ペア:

[(1, 18550720), (2, 9275360), (4, 4637680), (5, 3710144), (8, 2318840), (10, 1855072), (16, 1159420), (20, 927536), (29, 639680), (32, 579710), (40, 463768), (58, 319840), (64, 289855), (80, 231884), (116, 159920), (145, 127936), (160, 115942), (232, 79960), (290, 63968), (320, 57971), (464, 39980), (580, 31984), (928, 19990), (1160, 15992), (1856, 9995), (1999, 9280), (2320, 7996), (3998, 4640)]