20681452

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 42844032

約数和(自身を除く): 22162580

約数列:

[1, 2, 4, 11, 17, 22, 34, 43, 44, 68, 86, 172, 187, 374, 473, 643, 731, 748, 946, 1286, 1462, 1892, 2572, 2924, 7073, 8041, 10931, 14146, 16082, 21862, 27649, 28292, 32164, 43724, 55298, 110596, 120241, 240482, 304139, 470033, 480964, 608278, 940066, 1216556, 1880132, 5170363, 10340726, 20681452]

約数ペア:

[(1, 20681452), (2, 10340726), (4, 5170363), (11, 1880132), (17, 1216556), (22, 940066), (34, 608278), (43, 480964), (44, 470033), (68, 304139), (86, 240482), (172, 120241), (187, 110596), (374, 55298), (473, 43724), (643, 32164), (731, 28292), (748, 27649), (946, 21862), (1286, 16082), (1462, 14146), (1892, 10931), (2572, 8041), (2924, 7073)]