19467721

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 25346048

約数和(自身を除く): 5878327

約数列:

[1, 7, 13, 31, 67, 91, 103, 217, 403, 469, 721, 871, 1339, 2077, 2821, 3193, 6097, 6901, 9373, 14539, 22351, 27001, 41509, 48307, 89713, 189007, 213931, 290563, 627991, 1497517, 2781103, 19467721]

約数ペア:

[(1, 19467721), (7, 2781103), (13, 1497517), (31, 627991), (67, 290563), (91, 213931), (103, 189007), (217, 89713), (403, 48307), (469, 41509), (721, 27001), (871, 22351), (1339, 14539), (2077, 9373), (2821, 6901), (3193, 6097)]