816455680

素因数分解:

$2^{13}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:705

約数の個数: 112

約数和(自身を含む): 2025725184

約数和(自身を除く): 1209269504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 643, 992, 1024, 1240, 1280, 1286, 1984, 2048, 2480, 2560, 2572, 3215, 3968, 4096, 4960, 5120, 5144, 6430, 7936, 8192, 9920, 10240, 10288, 12860, 15872, 19840, 19933, 20480, 20576, 25720, 31744, 39680, 39866, 40960, 41152, 51440, 63488, 79360, 79732, 82304, 99665, 102880, 126976, 158720, 159464, 164608, 199330, 205760, 253952, 317440, 318928, 329216, 398660, 411520, 634880, 637856, 658432, 797320, 823040, 1269760, 1275712, 1316864, 1594640, 1646080, 2551424, 2633728, 3189280, 3292160, 5102848, 5267456, 6378560, 6584320, 10205696, 12757120, 13168640, 20411392, 25514240, 26337280, 40822784, 51028480, 81645568, 102056960, 163291136, 204113920, 408227840, 816455680]

約数ペア:

[(1, 816455680), (2, 408227840), (4, 204113920), (5, 163291136), (8, 102056960), (10, 81645568), (16, 51028480), (20, 40822784), (31, 26337280), (32, 25514240), (40, 20411392), (62, 13168640), (64, 12757120), (80, 10205696), (124, 6584320), (128, 6378560), (155, 5267456), (160, 5102848), (248, 3292160), (256, 3189280), (310, 2633728), (320, 2551424), (496, 1646080), (512, 1594640), (620, 1316864), (640, 1275712), (643, 1269760), (992, 823040), (1024, 797320), (1240, 658432), (1280, 637856), (1286, 634880), (1984, 411520), (2048, 398660), (2480, 329216), (2560, 318928), (2572, 317440), (3215, 253952), (3968, 205760), (4096, 199330), (4960, 164608), (5120, 159464), (5144, 158720), (6430, 126976), (7936, 102880), (8192, 99665), (9920, 82304), (10240, 79732), (10288, 79360), (12860, 63488), (15872, 51440), (19840, 41152), (19933, 40960), (20480, 39866), (20576, 39680), (25720, 31744)]