81646720

素因数分解:

$2^7\times 5^1\times {\mathrm{193}}^1\times {\mathrm{661}}^1$

素因数の和:873

約数の個数: 64

約数和(自身を含む): 196494840

約数和(自身を除く): 114848120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 193, 320, 386, 640, 661, 772, 965, 1322, 1544, 1930, 2644, 3088, 3305, 3860, 5288, 6176, 6610, 7720, 10576, 12352, 13220, 15440, 21152, 24704, 26440, 30880, 42304, 52880, 61760, 84608, 105760, 123520, 127573, 211520, 255146, 423040, 510292, 637865, 1020584, 1275730, 2041168, 2551460, 4082336, 5102920, 8164672, 10205840, 16329344, 20411680, 40823360, 81646720]

約数ペア:

[(1, 81646720), (2, 40823360), (4, 20411680), (5, 16329344), (8, 10205840), (10, 8164672), (16, 5102920), (20, 4082336), (32, 2551460), (40, 2041168), (64, 1275730), (80, 1020584), (128, 637865), (160, 510292), (193, 423040), (320, 255146), (386, 211520), (640, 127573), (661, 123520), (772, 105760), (965, 84608), (1322, 61760), (1544, 52880), (1930, 42304), (2644, 30880), (3088, 26440), (3305, 24704), (3860, 21152), (5288, 15440), (6176, 13220), (6610, 12352), (7720, 10576)]