12500000

素因数分解:

$2^5\times 5^8$

素因数の和:50

約数の個数: 54

約数和(自身を含む): 30761703

約数和(自身を除く): 18261703

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, 78125, 100000, 125000, 156250, 250000, 312500, 390625, 500000, 625000, 781250, 1250000, 1562500, 2500000, 3125000, 6250000, 12500000]

約数ペア:

[(1, 12500000), (2, 6250000), (4, 3125000), (5, 2500000), (8, 1562500), (10, 1250000), (16, 781250), (20, 625000), (25, 500000), (32, 390625), (40, 312500), (50, 250000), (80, 156250), (100, 125000), (125, 100000), (160, 78125), (200, 62500), (250, 50000), (400, 31250), (500, 25000), (625, 20000), (800, 15625), (1000, 12500), (1250, 10000), (2000, 6250), (2500, 5000), (3125, 4000)]