2000990

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{499}}^1$

素因数の和:907

約数の個数: 16

約数和(自身を含む): 3618000

約数和(自身を除く): 1617010

約数列:

[1, 2, 5, 10, 401, 499, 802, 998, 2005, 2495, 4010, 4990, 200099, 400198, 1000495, 2000990]

約数ペア:

[(1, 2000990), (2, 1000495), (5, 400198), (10, 200099), (401, 4990), (499, 4010), (802, 2495), (998, 2005)]