18107999

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:196

約数の個数: 32

約数和(自身を含む): 23654400

約数和(自身を除く): 5546401

約数列:

[1, 7, 13, 31, 49, 91, 131, 217, 343, 403, 637, 917, 1519, 1703, 2821, 4061, 4459, 6419, 10633, 11921, 19747, 28427, 44933, 52793, 83447, 138229, 198989, 369551, 584129, 1392923, 2586857, 18107999]

約数ペア:

[(1, 18107999), (7, 2586857), (13, 1392923), (31, 584129), (49, 369551), (91, 198989), (131, 138229), (217, 83447), (343, 52793), (403, 44933), (637, 28427), (917, 19747), (1519, 11921), (1703, 10633), (2821, 6419), (4061, 4459)]