21220283

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{991}}^1$

素因数の和:1047

約数の個数: 24

約数和(自身を含む): 27141120

約数和(自身を除く): 5920837

約数列:

[1, 7, 19, 23, 49, 133, 161, 437, 931, 991, 1127, 3059, 6937, 18829, 21413, 22793, 48559, 131803, 159551, 433067, 922621, 1116857, 3031469, 21220283]

約数ペア:

[(1, 21220283), (7, 3031469), (19, 1116857), (23, 922621), (49, 433067), (133, 159551), (161, 131803), (437, 48559), (931, 22793), (991, 21413), (1127, 18829), (3059, 6937)]