21181900

素因数分解:

$2^2\times 5^2\times {\mathrm{191}}^1\times {\mathrm{1109}}^1$

素因数の和:1314

約数の個数: 36

約数和(自身を含む): 46247040

約数和(自身を除く): 25065140

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 191, 382, 764, 955, 1109, 1910, 2218, 3820, 4436, 4775, 5545, 9550, 11090, 19100, 22180, 27725, 55450, 110900, 211819, 423638, 847276, 1059095, 2118190, 4236380, 5295475, 10590950, 21181900]

約数ペア:

[(1, 21181900), (2, 10590950), (4, 5295475), (5, 4236380), (10, 2118190), (20, 1059095), (25, 847276), (50, 423638), (100, 211819), (191, 110900), (382, 55450), (764, 27725), (955, 22180), (1109, 19100), (1910, 11090), (2218, 9550), (3820, 5545), (4436, 4775)]