21364161

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{563}}^1$

素因数の和:725

約数の個数: 32

約数和(自身を含む): 35374080

約数和(自身を除く): 14009919

約数列:

[1, 3, 7, 13, 21, 39, 91, 139, 273, 417, 563, 973, 1689, 1807, 2919, 3941, 5421, 7319, 11823, 12649, 21957, 37947, 51233, 78257, 153699, 234771, 547799, 1017341, 1643397, 3052023, 7121387, 21364161]

約数ペア:

[(1, 21364161), (3, 7121387), (7, 3052023), (13, 1643397), (21, 1017341), (39, 547799), (91, 234771), (139, 153699), (273, 78257), (417, 51233), (563, 37947), (973, 21957), (1689, 12649), (1807, 11823), (2919, 7319), (3941, 5421)]