21187347

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 31139328

約数和(自身を除く): 9951981

約数列:

[1, 3, 23, 37, 43, 69, 111, 129, 193, 579, 851, 989, 1591, 2553, 2967, 4439, 4773, 7141, 8299, 13317, 21423, 24897, 36593, 109779, 164243, 190877, 307063, 492729, 572631, 921189, 7062449, 21187347]

約数ペア:

[(1, 21187347), (3, 7062449), (23, 921189), (37, 572631), (43, 492729), (69, 307063), (111, 190877), (129, 164243), (193, 109779), (579, 36593), (851, 24897), (989, 21423), (1591, 13317), (2553, 8299), (2967, 7141), (4439, 4773)]