1820440

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:723

約数の個数: 32

約数和(自身を含む): 4160160

約数和(自身を除く): 2339720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 641, 710, 1282, 1420, 2564, 2840, 3205, 5128, 6410, 12820, 25640, 45511, 91022, 182044, 227555, 364088, 455110, 910220, 1820440]

約数ペア:

[(1, 1820440), (2, 910220), (4, 455110), (5, 364088), (8, 227555), (10, 182044), (20, 91022), (40, 45511), (71, 25640), (142, 12820), (284, 6410), (355, 5128), (568, 3205), (641, 2840), (710, 2564), (1282, 1420)]