31225000

素因数分解:

$2^3\times 5^5\times {\mathrm{1249}}^1$

素因数の和:1280

約数の個数: 48

約数和(自身を含む): 73237500

約数和(自身を除く): 42012500

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1249, 1250, 2498, 2500, 3125, 4996, 5000, 6245, 6250, 9992, 12490, 12500, 24980, 25000, 31225, 49960, 62450, 124900, 156125, 249800, 312250, 624500, 780625, 1249000, 1561250, 3122500, 3903125, 6245000, 7806250, 15612500, 31225000]

約数ペア:

[(1, 31225000), (2, 15612500), (4, 7806250), (5, 6245000), (8, 3903125), (10, 3122500), (20, 1561250), (25, 1249000), (40, 780625), (50, 624500), (100, 312250), (125, 249800), (200, 156125), (250, 124900), (500, 62450), (625, 49960), (1000, 31225), (1249, 25000), (1250, 24980), (2498, 12500), (2500, 12490), (3125, 9992), (4996, 6250), (5000, 6245)]