19711100

素因数分解:

$2^2\times 5^2\times {\mathrm{439}}^1\times {\mathrm{449}}^1$

素因数の和:902

約数の個数: 36

約数和(自身を含む): 42966000

約数和(自身を除く): 23254900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 439, 449, 878, 898, 1756, 1796, 2195, 2245, 4390, 4490, 8780, 8980, 10975, 11225, 21950, 22450, 43900, 44900, 197111, 394222, 788444, 985555, 1971110, 3942220, 4927775, 9855550, 19711100]

約数ペア:

[(1, 19711100), (2, 9855550), (4, 4927775), (5, 3942220), (10, 1971110), (20, 985555), (25, 788444), (50, 394222), (100, 197111), (439, 44900), (449, 43900), (878, 22450), (898, 21950), (1756, 11225), (1796, 10975), (2195, 8980), (2245, 8780), (4390, 4490)]