28388451

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 49424640

約数和(自身を除く): 21036189

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 169, 247, 273, 399, 421, 507, 741, 1183, 1263, 1729, 2947, 3211, 3549, 5187, 5473, 7999, 8841, 9633, 16419, 22477, 23997, 38311, 55993, 67431, 71149, 103987, 114933, 167979, 213447, 311961, 498043, 727909, 1351831, 1494129, 2183727, 4055493, 9462817, 28388451]

約数ペア:

[(1, 28388451), (3, 9462817), (7, 4055493), (13, 2183727), (19, 1494129), (21, 1351831), (39, 727909), (57, 498043), (91, 311961), (133, 213447), (169, 167979), (247, 114933), (273, 103987), (399, 71149), (421, 67431), (507, 55993), (741, 38311), (1183, 23997), (1263, 22477), (1729, 16419), (2947, 9633), (3211, 8841), (3549, 7999), (5187, 5473)]