8080000

素因数分解:

$2^7\times 5^4\times {\mathrm{101}}^1$

素因数の和:135

約数の個数: 80

約数和(自身を含む): 20313810

約数和(自身を除く): 12233810

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 101, 125, 128, 160, 200, 202, 250, 320, 400, 404, 500, 505, 625, 640, 800, 808, 1000, 1010, 1250, 1600, 1616, 2000, 2020, 2500, 2525, 3200, 3232, 4000, 4040, 5000, 5050, 6464, 8000, 8080, 10000, 10100, 12625, 12928, 16000, 16160, 20000, 20200, 25250, 32320, 40000, 40400, 50500, 63125, 64640, 80000, 80800, 101000, 126250, 161600, 202000, 252500, 323200, 404000, 505000, 808000, 1010000, 1616000, 2020000, 4040000, 8080000]

約数ペア:

[(1, 8080000), (2, 4040000), (4, 2020000), (5, 1616000), (8, 1010000), (10, 808000), (16, 505000), (20, 404000), (25, 323200), (32, 252500), (40, 202000), (50, 161600), (64, 126250), (80, 101000), (100, 80800), (101, 80000), (125, 64640), (128, 63125), (160, 50500), (200, 40400), (202, 40000), (250, 32320), (320, 25250), (400, 20200), (404, 20000), (500, 16160), (505, 16000), (625, 12928), (640, 12625), (800, 10100), (808, 10000), (1000, 8080), (1010, 8000), (1250, 6464), (1600, 5050), (1616, 5000), (2000, 4040), (2020, 4000), (2500, 3232), (2525, 3200)]