20999900

素因数分解:

$2^2\times 5^2\times {\mathrm{373}}^1\times {\mathrm{563}}^1$

素因数の和:950

約数の個数: 36

約数和(自身を含む): 45773112

約数和(自身を除く): 24773212

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 373, 563, 746, 1126, 1492, 1865, 2252, 2815, 3730, 5630, 7460, 9325, 11260, 14075, 18650, 28150, 37300, 56300, 209999, 419998, 839996, 1049995, 2099990, 4199980, 5249975, 10499950, 20999900]

約数ペア:

[(1, 20999900), (2, 10499950), (4, 5249975), (5, 4199980), (10, 2099990), (20, 1049995), (25, 839996), (50, 419998), (100, 209999), (373, 56300), (563, 37300), (746, 28150), (1126, 18650), (1492, 14075), (1865, 11260), (2252, 9325), (2815, 7460), (3730, 5630)]