21331990

素因数分解:

$2^1\times 5^1\times {\mathrm{449}}^1\times {\mathrm{4751}}^1$

素因数の和:5207

約数の個数: 16

約数和(自身を含む): 38491200

約数和(自身を除く): 17159210

約数列:

[1, 2, 5, 10, 449, 898, 2245, 4490, 4751, 9502, 23755, 47510, 2133199, 4266398, 10665995, 21331990]

約数ペア:

[(1, 21331990), (2, 10665995), (5, 4266398), (10, 2133199), (449, 47510), (898, 23755), (2245, 9502), (4490, 4751)]