1000000

素因数分解:

$2^6\times 5^6$

素因数の和:42

約数の個数: 49

約数和(自身を含む): 2480437

約数和(自身を除く): 1480437

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, 100000, 125000, 200000, 250000, 500000, 1000000]

約数ペア:

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