21076497

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:215

約数の個数: 48

約数和(自身を含む): 35136000

約数和(自身を除く): 14059503

約数列:

[1, 3, 9, 13, 27, 31, 39, 93, 117, 149, 169, 279, 351, 403, 447, 507, 837, 1209, 1341, 1521, 1937, 3627, 4023, 4563, 4619, 5239, 5811, 10881, 13857, 15717, 17433, 25181, 41571, 47151, 52299, 60047, 75543, 124713, 141453, 180141, 226629, 540423, 679887, 780611, 1621269, 2341833, 7025499, 21076497]

約数ペア:

[(1, 21076497), (3, 7025499), (9, 2341833), (13, 1621269), (27, 780611), (31, 679887), (39, 540423), (93, 226629), (117, 180141), (149, 141453), (169, 124713), (279, 75543), (351, 60047), (403, 52299), (447, 47151), (507, 41571), (837, 25181), (1209, 17433), (1341, 15717), (1521, 13857), (1937, 10881), (3627, 5811), (4023, 5239), (4563, 4619)]