21540596

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:229

約数の個数: 72

約数和(自身を含む): 48799296

約数和(自身を除く): 27258700

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 97, 98, 103, 154, 194, 196, 206, 308, 388, 412, 539, 679, 721, 1067, 1078, 1133, 1358, 1442, 2134, 2156, 2266, 2716, 2884, 4268, 4532, 4753, 5047, 7469, 7931, 9506, 9991, 10094, 14938, 15862, 19012, 19982, 20188, 29876, 31724, 39964, 52283, 55517, 69937, 104566, 109901, 111034, 139874, 209132, 219802, 222068, 279748, 439604, 489559, 769307, 979118, 1538614, 1958236, 3077228, 5385149, 10770298, 21540596]

約数ペア:

[(1, 21540596), (2, 10770298), (4, 5385149), (7, 3077228), (11, 1958236), (14, 1538614), (22, 979118), (28, 769307), (44, 489559), (49, 439604), (77, 279748), (97, 222068), (98, 219802), (103, 209132), (154, 139874), (194, 111034), (196, 109901), (206, 104566), (308, 69937), (388, 55517), (412, 52283), (539, 39964), (679, 31724), (721, 29876), (1067, 20188), (1078, 19982), (1133, 19012), (1358, 15862), (1442, 14938), (2134, 10094), (2156, 9991), (2266, 9506), (2716, 7931), (2884, 7469), (4268, 5047), (4532, 4753)]