20637575

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{991}}^1$

素因数の和:1032

約数の個数: 36

約数和(自身を含む): 31551552

約数和(自身を除く): 10913977

約数列:

[1, 5, 7, 17, 25, 35, 49, 85, 119, 175, 245, 425, 595, 833, 991, 1225, 2975, 4165, 4955, 6937, 16847, 20825, 24775, 34685, 48559, 84235, 117929, 173425, 242795, 421175, 589645, 825503, 1213975, 2948225, 4127515, 20637575]

約数ペア:

[(1, 20637575), (5, 4127515), (7, 2948225), (17, 1213975), (25, 825503), (35, 589645), (49, 421175), (85, 242795), (119, 173425), (175, 117929), (245, 84235), (425, 48559), (595, 34685), (833, 24775), (991, 20825), (1225, 16847), (2975, 6937), (4165, 4955)]