5000000

素因数分解:

$2^6\times 5^7$

素因数の和:47

約数の個数: 56

約数和(自身を含む): 12402312

約数和(自身を除く): 7402312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 625, 800, 1000, 1250, 1600, 2000, 2500, 3125, 4000, 5000, 6250, 8000, 10000, 12500, 15625, 20000, 25000, 31250, 40000, 50000, 62500, 78125, 100000, 125000, 156250, 200000, 250000, 312500, 500000, 625000, 1000000, 1250000, 2500000, 5000000]

約数ペア:

[(1, 5000000), (2, 2500000), (4, 1250000), (5, 1000000), (8, 625000), (10, 500000), (16, 312500), (20, 250000), (25, 200000), (32, 156250), (40, 125000), (50, 100000), (64, 78125), (80, 62500), (100, 50000), (125, 40000), (160, 31250), (200, 25000), (250, 20000), (320, 15625), (400, 12500), (500, 10000), (625, 8000), (800, 6250), (1000, 5000), (1250, 4000), (1600, 3125), (2000, 2500)]