128566720

素因数分解:

$2^6\times 5^1\times {\mathrm{401771}}^1$

素因数の和:401788

約数の個数: 28

約数和(自身を含む): 306150264

約数和(自身を除く): 177583544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 401771, 803542, 1607084, 2008855, 3214168, 4017710, 6428336, 8035420, 12856672, 16070840, 25713344, 32141680, 64283360, 128566720]

約数ペア:

[(1, 128566720), (2, 64283360), (4, 32141680), (5, 25713344), (8, 16070840), (10, 12856672), (16, 8035420), (20, 6428336), (32, 4017710), (40, 3214168), (64, 2008855), (80, 1607084), (160, 803542), (320, 401771)]