20939740

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{457}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 46166400

約数和(自身を除く): 25226660

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 116, 145, 158, 290, 316, 395, 457, 580, 790, 914, 1580, 1828, 2285, 2291, 4570, 4582, 9140, 9164, 11455, 13253, 22910, 26506, 36103, 45820, 53012, 66265, 72206, 132530, 144412, 180515, 265060, 361030, 722060, 1046987, 2093974, 4187948, 5234935, 10469870, 20939740]

約数ペア:

[(1, 20939740), (2, 10469870), (4, 5234935), (5, 4187948), (10, 2093974), (20, 1046987), (29, 722060), (58, 361030), (79, 265060), (116, 180515), (145, 144412), (158, 132530), (290, 72206), (316, 66265), (395, 53012), (457, 45820), (580, 36103), (790, 26506), (914, 22910), (1580, 13253), (1828, 11455), (2285, 9164), (2291, 9140), (4570, 4582)]