19897000

素因数分解:

$2^3\times 5^3\times {\mathrm{101}}^1\times {\mathrm{197}}^1$

素因数の和:319

約数の個数: 64

約数和(自身を含む): 47258640

約数和(自身を除く): 27361640

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 125, 197, 200, 202, 250, 394, 404, 500, 505, 788, 808, 985, 1000, 1010, 1576, 1970, 2020, 2525, 3940, 4040, 4925, 5050, 7880, 9850, 10100, 12625, 19700, 19897, 20200, 24625, 25250, 39400, 39794, 49250, 50500, 79588, 98500, 99485, 101000, 159176, 197000, 198970, 397940, 497425, 795880, 994850, 1989700, 2487125, 3979400, 4974250, 9948500, 19897000]

約数ペア:

[(1, 19897000), (2, 9948500), (4, 4974250), (5, 3979400), (8, 2487125), (10, 1989700), (20, 994850), (25, 795880), (40, 497425), (50, 397940), (100, 198970), (101, 197000), (125, 159176), (197, 101000), (200, 99485), (202, 98500), (250, 79588), (394, 50500), (404, 49250), (500, 39794), (505, 39400), (788, 25250), (808, 24625), (985, 20200), (1000, 19897), (1010, 19700), (1576, 12625), (1970, 10100), (2020, 9850), (2525, 7880), (3940, 5050), (4040, 4925)]