81681920

素因数分解:

$2^9\times 5^1\times {\mathrm{31907}}^1$

素因数の和:31930

約数の個数: 40

約数和(自身を含む): 195851304

約数和(自身を除く): 114169384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 31907, 63814, 127628, 159535, 255256, 319070, 510512, 638140, 1021024, 1276280, 2042048, 2552560, 4084096, 5105120, 8168192, 10210240, 16336384, 20420480, 40840960, 81681920]

約数ペア:

[(1, 81681920), (2, 40840960), (4, 20420480), (5, 16336384), (8, 10210240), (10, 8168192), (16, 5105120), (20, 4084096), (32, 2552560), (40, 2042048), (64, 1276280), (80, 1021024), (128, 638140), (160, 510512), (256, 319070), (320, 255256), (512, 159535), (640, 127628), (1280, 63814), (2560, 31907)]