2001820

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1101

約数の個数: 24

約数和(自身を含む): 4249728

約数和(自身を除く): 2247908

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 991, 1010, 1982, 2020, 3964, 4955, 9910, 19820, 100091, 200182, 400364, 500455, 1000910, 2001820]

約数ペア:

[(1, 2001820), (2, 1000910), (4, 500455), (5, 400364), (10, 200182), (20, 100091), (101, 19820), (202, 9910), (404, 4955), (505, 3964), (991, 2020), (1010, 1982)]