18905817

素因数分解:

$3^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{967}}^1$

素因数の和:1010

約数の個数: 32

約数和(自身を含む): 30976000

約数和(自身を除く): 12070183

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 343, 399, 931, 967, 1029, 2793, 2901, 6517, 6769, 18373, 19551, 20307, 47383, 55119, 128611, 142149, 331681, 385833, 900277, 995043, 2700831, 6301939, 18905817]

約数ペア:

[(1, 18905817), (3, 6301939), (7, 2700831), (19, 995043), (21, 900277), (49, 385833), (57, 331681), (133, 142149), (147, 128611), (343, 55119), (399, 47383), (931, 20307), (967, 19551), (1029, 18373), (2793, 6769), (2901, 6517)]