1287680

素因数分解:

$2^9\times 5^1\times {\mathrm{503}}^1$

素因数の和:526

約数の個数: 40

約数和(自身を含む): 3093552

約数和(自身を除く): 1805872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 503, 512, 640, 1006, 1280, 2012, 2515, 2560, 4024, 5030, 8048, 10060, 16096, 20120, 32192, 40240, 64384, 80480, 128768, 160960, 257536, 321920, 643840, 1287680]

約数ペア:

[(1, 1287680), (2, 643840), (4, 321920), (5, 257536), (8, 160960), (10, 128768), (16, 80480), (20, 64384), (32, 40240), (40, 32192), (64, 20120), (80, 16096), (128, 10060), (160, 8048), (256, 5030), (320, 4024), (503, 2560), (512, 2515), (640, 2012), (1006, 1280)]