87663891

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31387}}^1$

素因数の和:31423

約数の個数: 24

約数和(自身を含む): 143129280

約数和(自身を除く): 55465389

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 31387, 94161, 219709, 596353, 659127, 1537963, 1789059, 4174471, 4613889, 12523413, 29221297, 87663891]

約数ペア:

[(1, 87663891), (3, 29221297), (7, 12523413), (19, 4613889), (21, 4174471), (49, 1789059), (57, 1537963), (133, 659127), (147, 596353), (399, 219709), (931, 94161), (2793, 31387)]