404000000

素因数分解:

$2^8\times 5^6\times {\mathrm{101}}^1$

素因数の和:147

約数の個数: 126

約数和(自身を含む): 1017994782

約数和(自身を除く): 613994782

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, 256, 320, 400, 404, 500, 505, 625, 640, 800, 808, 1000, 1010, 1250, 1280, 1600, 1616, 2000, 2020, 2500, 2525, 3125, 3200, 3232, 4000, 4040, 5000, 5050, 6250, 6400, 6464, 8000, 8080, 10000, 10100, 12500, 12625, 12928, 15625, 16000, 16160, 20000, 20200, 25000, 25250, 25856, 31250, 32000, 32320, 40000, 40400, 50000, 50500, 62500, 63125, 64640, 80000, 80800, 100000, 101000, 125000, 126250, 129280, 160000, 161600, 200000, 202000, 250000, 252500, 315625, 323200, 400000, 404000, 500000, 505000, 631250, 646400, 800000, 808000, 1000000, 1010000, 1262500, 1578125, 1616000, 2000000, 2020000, 2525000, 3156250, 3232000, 4000000, 4040000, 5050000, 6312500, 8080000, 10100000, 12625000, 16160000, 20200000, 25250000, 40400000, 50500000, 80800000, 101000000, 202000000, 404000000]

約数ペア:

[(1, 404000000), (2, 202000000), (4, 101000000), (5, 80800000), (8, 50500000), (10, 40400000), (16, 25250000), (20, 20200000), (25, 16160000), (32, 12625000), (40, 10100000), (50, 8080000), (64, 6312500), (80, 5050000), (100, 4040000), (101, 4000000), (125, 3232000), (128, 3156250), (160, 2525000), (200, 2020000), (202, 2000000), (250, 1616000), (256, 1578125), (320, 1262500), (400, 1010000), (404, 1000000), (500, 808000), (505, 800000), (625, 646400), (640, 631250), (800, 505000), (808, 500000), (1000, 404000), (1010, 400000), (1250, 323200), (1280, 315625), (1600, 252500), (1616, 250000), (2000, 202000), (2020, 200000), (2500, 161600), (2525, 160000), (3125, 129280), (3200, 126250), (3232, 125000), (4000, 101000), (4040, 100000), (5000, 80800), (5050, 80000), (6250, 64640), (6400, 63125), (6464, 62500), (8000, 50500), (8080, 50000), (10000, 40400), (10100, 40000), (12500, 32320), (12625, 32000), (12928, 31250), (15625, 25856), (16000, 25250), (16160, 25000), (20000, 20200)]