28385800

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1999}}^1$

素因数の和:2086

約数の個数: 48

約数和(自身を含む): 66960000

約数和(自身を除く): 38574200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1420, 1775, 1999, 2840, 3550, 3998, 7100, 7996, 9995, 14200, 15992, 19990, 39980, 49975, 79960, 99950, 141929, 199900, 283858, 399800, 567716, 709645, 1135432, 1419290, 2838580, 3548225, 5677160, 7096450, 14192900, 28385800]

約数ペア:

[(1, 28385800), (2, 14192900), (4, 7096450), (5, 5677160), (8, 3548225), (10, 2838580), (20, 1419290), (25, 1135432), (40, 709645), (50, 567716), (71, 399800), (100, 283858), (142, 199900), (200, 141929), (284, 99950), (355, 79960), (568, 49975), (710, 39980), (1420, 19990), (1775, 15992), (1999, 14200), (2840, 9995), (3550, 7996), (3998, 7100)]