19984181

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 25681920

約数和(自身を除く): 5697739

約数列:

[1, 7, 19, 31, 37, 131, 133, 217, 259, 589, 703, 917, 1147, 2489, 4061, 4123, 4847, 4921, 8029, 17423, 21793, 28427, 33929, 77159, 92093, 150257, 152551, 540113, 644651, 1051799, 2854883, 19984181]

約数ペア:

[(1, 19984181), (7, 2854883), (19, 1051799), (31, 644651), (37, 540113), (131, 152551), (133, 150257), (217, 92093), (259, 77159), (589, 33929), (703, 28427), (917, 21793), (1147, 17423), (2489, 8029), (4061, 4921), (4123, 4847)]