81756160

素因数分解:

$2^{15}\times 5^1\times {\mathrm{499}}^1$

素因数の和:534

約数の個数: 64

約数和(自身を含む): 196605000

約数和(自身を除く): 114848840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 499, 512, 640, 998, 1024, 1280, 1996, 2048, 2495, 2560, 3992, 4096, 4990, 5120, 7984, 8192, 9980, 10240, 15968, 16384, 19960, 20480, 31936, 32768, 39920, 40960, 63872, 79840, 81920, 127744, 159680, 163840, 255488, 319360, 510976, 638720, 1021952, 1277440, 2043904, 2554880, 4087808, 5109760, 8175616, 10219520, 16351232, 20439040, 40878080, 81756160]

約数ペア:

[(1, 81756160), (2, 40878080), (4, 20439040), (5, 16351232), (8, 10219520), (10, 8175616), (16, 5109760), (20, 4087808), (32, 2554880), (40, 2043904), (64, 1277440), (80, 1021952), (128, 638720), (160, 510976), (256, 319360), (320, 255488), (499, 163840), (512, 159680), (640, 127744), (998, 81920), (1024, 79840), (1280, 63872), (1996, 40960), (2048, 39920), (2495, 32768), (2560, 31936), (3992, 20480), (4096, 19960), (4990, 16384), (5120, 15968), (7984, 10240), (8192, 9980)]