18003988

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{103}}^1\times {\mathrm{491}}^1$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 32235840

約数和(自身を除く): 14231852

約数列:

[1, 2, 4, 89, 103, 178, 206, 356, 412, 491, 982, 1964, 9167, 18334, 36668, 43699, 50573, 87398, 101146, 174796, 202292, 4500997, 9001994, 18003988]

約数ペア:

[(1, 18003988), (2, 9001994), (4, 4500997), (89, 202292), (103, 174796), (178, 101146), (206, 87398), (356, 50573), (412, 43699), (491, 36668), (982, 18334), (1964, 9167)]