28335640

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:284

約数の個数: 64

約数和(自身を含む): 65973600

約数和(自身を除く): 37637960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 97, 109, 134, 194, 218, 268, 335, 388, 436, 485, 536, 545, 670, 776, 872, 970, 1090, 1340, 1940, 2180, 2680, 3880, 4360, 6499, 7303, 10573, 12998, 14606, 21146, 25996, 29212, 32495, 36515, 42292, 51992, 52865, 58424, 64990, 73030, 84584, 105730, 129980, 146060, 211460, 259960, 292120, 422920, 708391, 1416782, 2833564, 3541955, 5667128, 7083910, 14167820, 28335640]

約数ペア:

[(1, 28335640), (2, 14167820), (4, 7083910), (5, 5667128), (8, 3541955), (10, 2833564), (20, 1416782), (40, 708391), (67, 422920), (97, 292120), (109, 259960), (134, 211460), (194, 146060), (218, 129980), (268, 105730), (335, 84584), (388, 73030), (436, 64990), (485, 58424), (536, 52865), (545, 51992), (670, 42292), (776, 36515), (872, 32495), (970, 29212), (1090, 25996), (1340, 21146), (1940, 14606), (2180, 12998), (2680, 10573), (3880, 7303), (4360, 6499)]