1988807680

素因数分解:

$2^{10}\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1249}}^1$

素因数の和:1585

約数の個数: 88

約数和(自身を含む): 4789980000

約数和(自身を除く): 2801172320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 311, 320, 512, 622, 640, 1024, 1244, 1249, 1280, 1555, 2488, 2498, 2560, 3110, 4976, 4996, 5120, 6220, 6245, 9952, 9992, 12440, 12490, 19904, 19984, 24880, 24980, 39808, 39968, 49760, 49960, 79616, 79936, 99520, 99920, 159232, 159872, 199040, 199840, 318464, 319744, 388439, 398080, 399680, 639488, 776878, 796160, 799360, 1278976, 1553756, 1592320, 1598720, 1942195, 3107512, 3197440, 3884390, 6215024, 6394880, 7768780, 12430048, 15537560, 24860096, 31075120, 49720192, 62150240, 99440384, 124300480, 198880768, 248600960, 397761536, 497201920, 994403840, 1988807680]

約数ペア:

[(1, 1988807680), (2, 994403840), (4, 497201920), (5, 397761536), (8, 248600960), (10, 198880768), (16, 124300480), (20, 99440384), (32, 62150240), (40, 49720192), (64, 31075120), (80, 24860096), (128, 15537560), (160, 12430048), (256, 7768780), (311, 6394880), (320, 6215024), (512, 3884390), (622, 3197440), (640, 3107512), (1024, 1942195), (1244, 1598720), (1249, 1592320), (1280, 1553756), (1555, 1278976), (2488, 799360), (2498, 796160), (2560, 776878), (3110, 639488), (4976, 399680), (4996, 398080), (5120, 388439), (6220, 319744), (6245, 318464), (9952, 199840), (9992, 199040), (12440, 159872), (12490, 159232), (19904, 99920), (19984, 99520), (24880, 79936), (24980, 79616), (39808, 49960), (39968, 49760)]