20420480

素因数分解:

$2^7\times 5^1\times {\mathrm{31907}}^1$

素因数の和:31926

約数の個数: 32

約数和(自身を含む): 48819240

約数和(自身を除く): 28398760

約数列:

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

約数ペア:

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