19450000

素因数分解:

$2^4\times 5^5\times {\mathrm{389}}^1$

素因数の和:422

約数の個数: 60

約数和(自身を含む): 47223540

約数和(自身を除く): 27773540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 389, 400, 500, 625, 778, 1000, 1250, 1556, 1945, 2000, 2500, 3112, 3125, 3890, 5000, 6224, 6250, 7780, 9725, 10000, 12500, 15560, 19450, 25000, 31120, 38900, 48625, 50000, 77800, 97250, 155600, 194500, 243125, 389000, 486250, 778000, 972500, 1215625, 1945000, 2431250, 3890000, 4862500, 9725000, 19450000]

約数ペア:

[(1, 19450000), (2, 9725000), (4, 4862500), (5, 3890000), (8, 2431250), (10, 1945000), (16, 1215625), (20, 972500), (25, 778000), (40, 486250), (50, 389000), (80, 243125), (100, 194500), (125, 155600), (200, 97250), (250, 77800), (389, 50000), (400, 48625), (500, 38900), (625, 31120), (778, 25000), (1000, 19450), (1250, 15560), (1556, 12500), (1945, 10000), (2000, 9725), (2500, 7780), (3112, 6250), (3125, 6224), (3890, 5000)]