640220000

素因数分解:

$2^5\times 5^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{269}}^1$

素因数の和:323

約数の個数: 240

約数和(自身を含む): 1913012640

約数和(自身を除く): 1272792640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 25, 28, 32, 34, 35, 40, 50, 56, 68, 70, 80, 85, 100, 112, 119, 125, 136, 140, 160, 170, 175, 200, 224, 238, 250, 269, 272, 280, 340, 350, 400, 425, 476, 500, 538, 544, 560, 595, 625, 680, 700, 800, 850, 875, 952, 1000, 1076, 1120, 1190, 1250, 1345, 1360, 1400, 1700, 1750, 1883, 1904, 2000, 2125, 2152, 2380, 2500, 2690, 2720, 2800, 2975, 3400, 3500, 3766, 3808, 4000, 4250, 4304, 4375, 4573, 4760, 5000, 5380, 5600, 5950, 6725, 6800, 7000, 7532, 8500, 8608, 8750, 9146, 9415, 9520, 10000, 10625, 10760, 11900, 13450, 13600, 14000, 14875, 15064, 17000, 17500, 18292, 18830, 19040, 20000, 21250, 21520, 22865, 23800, 26900, 28000, 29750, 30128, 32011, 33625, 34000, 35000, 36584, 37660, 42500, 43040, 45730, 47075, 47600, 53800, 59500, 60256, 64022, 67250, 68000, 70000, 73168, 74375, 75320, 85000, 91460, 94150, 95200, 107600, 114325, 119000, 128044, 134500, 140000, 146336, 148750, 150640, 160055, 168125, 170000, 182920, 188300, 215200, 228650, 235375, 238000, 256088, 269000, 297500, 301280, 320110, 336250, 340000, 365840, 376600, 457300, 470750, 476000, 512176, 538000, 571625, 595000, 640220, 672500, 731680, 753200, 800275, 914600, 941500, 1024352, 1076000, 1143250, 1176875, 1190000, 1280440, 1345000, 1506400, 1600550, 1829200, 1883000, 2286500, 2353750, 2380000, 2560880, 2690000, 2858125, 3201100, 3658400, 3766000, 4001375, 4573000, 4707500, 5121760, 5380000, 5716250, 6402200, 7532000, 8002750, 9146000, 9415000, 11432500, 12804400, 16005500, 18292000, 18830000, 20006875, 22865000, 25608800, 32011000, 37660000, 40013750, 45730000, 64022000, 80027500, 91460000, 128044000, 160055000, 320110000, 640220000]

約数ペア:

[(1, 640220000), (2, 320110000), (4, 160055000), (5, 128044000), (7, 91460000), (8, 80027500), (10, 64022000), (14, 45730000), (16, 40013750), (17, 37660000), (20, 32011000), (25, 25608800), (28, 22865000), (32, 20006875), (34, 18830000), (35, 18292000), (40, 16005500), (50, 12804400), (56, 11432500), (68, 9415000), (70, 9146000), (80, 8002750), (85, 7532000), (100, 6402200), (112, 5716250), (119, 5380000), (125, 5121760), (136, 4707500), (140, 4573000), (160, 4001375), (170, 3766000), (175, 3658400), (200, 3201100), (224, 2858125), (238, 2690000), (250, 2560880), (269, 2380000), (272, 2353750), (280, 2286500), (340, 1883000), (350, 1829200), (400, 1600550), (425, 1506400), (476, 1345000), (500, 1280440), (538, 1190000), (544, 1176875), (560, 1143250), (595, 1076000), (625, 1024352), (680, 941500), (700, 914600), (800, 800275), (850, 753200), (875, 731680), (952, 672500), (1000, 640220), (1076, 595000), (1120, 571625), (1190, 538000), (1250, 512176), (1345, 476000), (1360, 470750), (1400, 457300), (1700, 376600), (1750, 365840), (1883, 340000), (1904, 336250), (2000, 320110), (2125, 301280), (2152, 297500), (2380, 269000), (2500, 256088), (2690, 238000), (2720, 235375), (2800, 228650), (2975, 215200), (3400, 188300), (3500, 182920), (3766, 170000), (3808, 168125), (4000, 160055), (4250, 150640), (4304, 148750), (4375, 146336), (4573, 140000), (4760, 134500), (5000, 128044), (5380, 119000), (5600, 114325), (5950, 107600), (6725, 95200), (6800, 94150), (7000, 91460), (7532, 85000), (8500, 75320), (8608, 74375), (8750, 73168), (9146, 70000), (9415, 68000), (9520, 67250), (10000, 64022), (10625, 60256), (10760, 59500), (11900, 53800), (13450, 47600), (13600, 47075), (14000, 45730), (14875, 43040), (15064, 42500), (17000, 37660), (17500, 36584), (18292, 35000), (18830, 34000), (19040, 33625), (20000, 32011), (21250, 30128), (21520, 29750), (22865, 28000), (23800, 26900)]