20299990

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^2\times {\mathrm{199}}^1$

素因数の和:408

約数の個数: 24

約数和(自身を含む): 37090800

約数和(自身を除く): 16790810

約数列:

[1, 2, 5, 10, 101, 199, 202, 398, 505, 995, 1010, 1990, 10201, 20099, 20402, 40198, 51005, 100495, 102010, 200990, 2029999, 4059998, 10149995, 20299990]

約数ペア:

[(1, 20299990), (2, 10149995), (5, 4059998), (10, 2029999), (101, 200990), (199, 102010), (202, 100495), (398, 51005), (505, 40198), (995, 20402), (1010, 20099), (1990, 10201)]