1990983680

素因数分解:

$2^{18}\times 5^1\times 7^2\times {\mathrm{31}}^1$

素因数の和:86

約数の個数: 228

約数和(自身を含む): 5737796928

約数和(自身を除く): 3746813248

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 49, 56, 62, 64, 70, 80, 98, 112, 124, 128, 140, 155, 160, 196, 217, 224, 245, 248, 256, 280, 310, 320, 392, 434, 448, 490, 496, 512, 560, 620, 640, 784, 868, 896, 980, 992, 1024, 1085, 1120, 1240, 1280, 1519, 1568, 1736, 1792, 1960, 1984, 2048, 2170, 2240, 2480, 2560, 3038, 3136, 3472, 3584, 3920, 3968, 4096, 4340, 4480, 4960, 5120, 6076, 6272, 6944, 7168, 7595, 7840, 7936, 8192, 8680, 8960, 9920, 10240, 12152, 12544, 13888, 14336, 15190, 15680, 15872, 16384, 17360, 17920, 19840, 20480, 24304, 25088, 27776, 28672, 30380, 31360, 31744, 32768, 34720, 35840, 39680, 40960, 48608, 50176, 55552, 57344, 60760, 62720, 63488, 65536, 69440, 71680, 79360, 81920, 97216, 100352, 111104, 114688, 121520, 125440, 126976, 131072, 138880, 143360, 158720, 163840, 194432, 200704, 222208, 229376, 243040, 250880, 253952, 262144, 277760, 286720, 317440, 327680, 388864, 401408, 444416, 458752, 486080, 501760, 507904, 555520, 573440, 634880, 655360, 777728, 802816, 888832, 917504, 972160, 1003520, 1015808, 1111040, 1146880, 1269760, 1310720, 1555456, 1605632, 1777664, 1835008, 1944320, 2007040, 2031616, 2222080, 2293760, 2539520, 3110912, 3211264, 3555328, 3888640, 4014080, 4063232, 4444160, 4587520, 5079040, 6221824, 6422528, 7110656, 7777280, 8028160, 8126464, 8888320, 9175040, 10158080, 12443648, 12845056, 14221312, 15554560, 16056320, 17776640, 20316160, 24887296, 28442624, 31109120, 32112640, 35553280, 40632320, 49774592, 56885248, 62218240, 64225280, 71106560, 99549184, 124436480, 142213120, 199098368, 248872960, 284426240, 398196736, 497745920, 995491840, 1990983680]

約数ペア:

[(1, 1990983680), (2, 995491840), (4, 497745920), (5, 398196736), (7, 284426240), (8, 248872960), (10, 199098368), (14, 142213120), (16, 124436480), (20, 99549184), (28, 71106560), (31, 64225280), (32, 62218240), (35, 56885248), (40, 49774592), (49, 40632320), (56, 35553280), (62, 32112640), (64, 31109120), (70, 28442624), (80, 24887296), (98, 20316160), (112, 17776640), (124, 16056320), (128, 15554560), (140, 14221312), (155, 12845056), (160, 12443648), (196, 10158080), (217, 9175040), (224, 8888320), (245, 8126464), (248, 8028160), (256, 7777280), (280, 7110656), (310, 6422528), (320, 6221824), (392, 5079040), (434, 4587520), (448, 4444160), (490, 4063232), (496, 4014080), (512, 3888640), (560, 3555328), (620, 3211264), (640, 3110912), (784, 2539520), (868, 2293760), (896, 2222080), (980, 2031616), (992, 2007040), (1024, 1944320), (1085, 1835008), (1120, 1777664), (1240, 1605632), (1280, 1555456), (1519, 1310720), (1568, 1269760), (1736, 1146880), (1792, 1111040), (1960, 1015808), (1984, 1003520), (2048, 972160), (2170, 917504), (2240, 888832), (2480, 802816), (2560, 777728), (3038, 655360), (3136, 634880), (3472, 573440), (3584, 555520), (3920, 507904), (3968, 501760), (4096, 486080), (4340, 458752), (4480, 444416), (4960, 401408), (5120, 388864), (6076, 327680), (6272, 317440), (6944, 286720), (7168, 277760), (7595, 262144), (7840, 253952), (7936, 250880), (8192, 243040), (8680, 229376), (8960, 222208), (9920, 200704), (10240, 194432), (12152, 163840), (12544, 158720), (13888, 143360), (14336, 138880), (15190, 131072), (15680, 126976), (15872, 125440), (16384, 121520), (17360, 114688), (17920, 111104), (19840, 100352), (20480, 97216), (24304, 81920), (25088, 79360), (27776, 71680), (28672, 69440), (30380, 65536), (31360, 63488), (31744, 62720), (32768, 60760), (34720, 57344), (35840, 55552), (39680, 50176), (40960, 48608)]