20012500

素因数分解:

$2^2\times 5^5\times {\mathrm{1601}}^1$

素因数の和:1630

約数の個数: 36

約数和(自身を含む): 43801884

約数和(自身を除く): 23789384

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 1601, 2500, 3125, 3202, 6250, 6404, 8005, 12500, 16010, 32020, 40025, 80050, 160100, 200125, 400250, 800500, 1000625, 2001250, 4002500, 5003125, 10006250, 20012500]

約数ペア:

[(1, 20012500), (2, 10006250), (4, 5003125), (5, 4002500), (10, 2001250), (20, 1000625), (25, 800500), (50, 400250), (100, 200125), (125, 160100), (250, 80050), (500, 40025), (625, 32020), (1250, 16010), (1601, 12500), (2500, 8005), (3125, 6404), (3202, 6250)]