21478113

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 35143680

約数和(自身を除く): 13665567

約数列:

[1, 3, 9, 19, 23, 43, 57, 69, 127, 129, 171, 207, 381, 387, 437, 817, 989, 1143, 1311, 2413, 2451, 2921, 2967, 3933, 5461, 7239, 7353, 8763, 8901, 16383, 18791, 21717, 26289, 49149, 55499, 56373, 103759, 125603, 166497, 169119, 311277, 376809, 499491, 933831, 1130427, 2386457, 7159371, 21478113]

約数ペア:

[(1, 21478113), (3, 7159371), (9, 2386457), (19, 1130427), (23, 933831), (43, 499491), (57, 376809), (69, 311277), (127, 169119), (129, 166497), (171, 125603), (207, 103759), (381, 56373), (387, 55499), (437, 49149), (817, 26289), (989, 21717), (1143, 18791), (1311, 16383), (2413, 8901), (2451, 8763), (2921, 7353), (2967, 7239), (3933, 5461)]