21490900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{11311}}^1$

素因数の和:11344

約数の個数: 36

約数和(自身を含む): 49094080

約数和(自身を除く): 27603180

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 950, 1900, 11311, 22622, 45244, 56555, 113110, 214909, 226220, 282775, 429818, 565550, 859636, 1074545, 1131100, 2149090, 4298180, 5372725, 10745450, 21490900]

約数ペア:

[(1, 21490900), (2, 10745450), (4, 5372725), (5, 4298180), (10, 2149090), (19, 1131100), (20, 1074545), (25, 859636), (38, 565550), (50, 429818), (76, 282775), (95, 226220), (100, 214909), (190, 113110), (380, 56555), (475, 45244), (950, 22622), (1900, 11311)]