1245790720

素因数分解:

$2^9\times 5^1\times {\mathrm{486637}}^1$

素因数の和:486660

約数の個数: 40

約数和(自身を含む): 2986984044

約数和(自身を除く): 1741193324

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 486637, 973274, 1946548, 2433185, 3893096, 4866370, 7786192, 9732740, 15572384, 19465480, 31144768, 38930960, 62289536, 77861920, 124579072, 155723840, 249158144, 311447680, 622895360, 1245790720]

約数ペア:

[(1, 1245790720), (2, 622895360), (4, 311447680), (5, 249158144), (8, 155723840), (10, 124579072), (16, 77861920), (20, 62289536), (32, 38930960), (40, 31144768), (64, 19465480), (80, 15572384), (128, 9732740), (160, 7786192), (256, 4866370), (320, 3893096), (512, 2433185), (640, 1946548), (1280, 973274), (2560, 486637)]