500000

素因数分解:

$2^5\times 5^6$

素因数の和:40

約数の個数: 42

約数和(自身を含む): 1230453

約数和(自身を除く): 730453

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1250, 2000, 2500, 3125, 4000, 5000, 6250, 10000, 12500, 15625, 20000, 25000, 31250, 50000, 62500, 100000, 125000, 250000, 500000]

約数ペア:

[(1, 500000), (2, 250000), (4, 125000), (5, 100000), (8, 62500), (10, 50000), (16, 31250), (20, 25000), (25, 20000), (32, 15625), (40, 12500), (50, 10000), (80, 6250), (100, 5000), (125, 4000), (160, 3125), (200, 2500), (250, 2000), (400, 1250), (500, 1000), (625, 800)]