20508738280

素因数分解:

$2^3\times 5^1\times {\mathrm{4987}}^1\times {\mathrm{102811}}^1$

素因数の和:107809

約数の個数: 32

約数和(自身を含む): 46154363040

約数和(自身を除く): 25645624760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4987, 9974, 19948, 24935, 39896, 49870, 99740, 102811, 199480, 205622, 411244, 514055, 822488, 1028110, 2056220, 4112440, 512718457, 1025436914, 2050873828, 2563592285, 4101747656, 5127184570, 10254369140, 20508738280]

約数ペア:

[(1, 20508738280), (2, 10254369140), (4, 5127184570), (5, 4101747656), (8, 2563592285), (10, 2050873828), (20, 1025436914), (40, 512718457), (4987, 4112440), (9974, 2056220), (19948, 1028110), (24935, 822488), (39896, 514055), (49870, 411244), (99740, 205622), (102811, 199480)]