28184611

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 36528128

約数和(自身を除く): 8343517

約数列:

[1, 7, 13, 31, 91, 97, 103, 217, 403, 679, 721, 1261, 1339, 2821, 3007, 3193, 8827, 9373, 9991, 21049, 22351, 39091, 41509, 69937, 129883, 273637, 290563, 309721, 909181, 2168047, 4026373, 28184611]

約数ペア:

[(1, 28184611), (7, 4026373), (13, 2168047), (31, 909181), (91, 309721), (97, 290563), (103, 273637), (217, 129883), (403, 69937), (679, 41509), (721, 39091), (1261, 22351), (1339, 21049), (2821, 9991), (3007, 9373), (3193, 8827)]