21062500

素因数分解:

$2^2\times 5^6\times {\mathrm{337}}^1$

素因数の和:371

約数の個数: 42

約数和(自身を含む): 46210346

約数和(自身を除く): 25147846

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 337, 500, 625, 674, 1250, 1348, 1685, 2500, 3125, 3370, 6250, 6740, 8425, 12500, 15625, 16850, 31250, 33700, 42125, 62500, 84250, 168500, 210625, 421250, 842500, 1053125, 2106250, 4212500, 5265625, 10531250, 21062500]

約数ペア:

[(1, 21062500), (2, 10531250), (4, 5265625), (5, 4212500), (10, 2106250), (20, 1053125), (25, 842500), (50, 421250), (100, 210625), (125, 168500), (250, 84250), (337, 62500), (500, 42125), (625, 33700), (674, 31250), (1250, 16850), (1348, 15625), (1685, 12500), (2500, 8425), (3125, 6740), (3370, 6250)]