256900000

素因数分解:

$2^5\times 5^5\times 7^1\times {\mathrm{367}}^1$

素因数の和:409

約数の個数: 144

約数和(自身を含む): 724453632

約数和(自身を除く): 467553632

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 56, 70, 80, 100, 112, 125, 140, 160, 175, 200, 224, 250, 280, 350, 367, 400, 500, 560, 625, 700, 734, 800, 875, 1000, 1120, 1250, 1400, 1468, 1750, 1835, 2000, 2500, 2569, 2800, 2936, 3125, 3500, 3670, 4000, 4375, 5000, 5138, 5600, 5872, 6250, 7000, 7340, 8750, 9175, 10000, 10276, 11744, 12500, 12845, 14000, 14680, 17500, 18350, 20000, 20552, 21875, 25000, 25690, 28000, 29360, 35000, 36700, 41104, 43750, 45875, 50000, 51380, 58720, 64225, 70000, 73400, 82208, 87500, 91750, 100000, 102760, 128450, 140000, 146800, 175000, 183500, 205520, 229375, 256900, 293600, 321125, 350000, 367000, 411040, 458750, 513800, 642250, 700000, 734000, 917500, 1027600, 1146875, 1284500, 1468000, 1605625, 1835000, 2055200, 2293750, 2569000, 3211250, 3670000, 4587500, 5138000, 6422500, 7340000, 8028125, 9175000, 10276000, 12845000, 16056250, 18350000, 25690000, 32112500, 36700000, 51380000, 64225000, 128450000, 256900000]

約数ペア:

[(1, 256900000), (2, 128450000), (4, 64225000), (5, 51380000), (7, 36700000), (8, 32112500), (10, 25690000), (14, 18350000), (16, 16056250), (20, 12845000), (25, 10276000), (28, 9175000), (32, 8028125), (35, 7340000), (40, 6422500), (50, 5138000), (56, 4587500), (70, 3670000), (80, 3211250), (100, 2569000), (112, 2293750), (125, 2055200), (140, 1835000), (160, 1605625), (175, 1468000), (200, 1284500), (224, 1146875), (250, 1027600), (280, 917500), (350, 734000), (367, 700000), (400, 642250), (500, 513800), (560, 458750), (625, 411040), (700, 367000), (734, 350000), (800, 321125), (875, 293600), (1000, 256900), (1120, 229375), (1250, 205520), (1400, 183500), (1468, 175000), (1750, 146800), (1835, 140000), (2000, 128450), (2500, 102760), (2569, 100000), (2800, 91750), (2936, 87500), (3125, 82208), (3500, 73400), (3670, 70000), (4000, 64225), (4375, 58720), (5000, 51380), (5138, 50000), (5600, 45875), (5872, 43750), (6250, 41104), (7000, 36700), (7340, 35000), (8750, 29360), (9175, 28000), (10000, 25690), (10276, 25000), (11744, 21875), (12500, 20552), (12845, 20000), (14000, 18350), (14680, 17500)]