21095757

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:238

約数の個数: 36

約数和(自身を含む): 33125664

約数和(自身を除く): 12029907

約数列:

[1, 3, 9, 19, 43, 57, 129, 151, 171, 361, 387, 453, 817, 1083, 1359, 2451, 2869, 3249, 6493, 7353, 8607, 15523, 19479, 25821, 46569, 54511, 58437, 123367, 139707, 163533, 370101, 490599, 1110303, 2343973, 7031919, 21095757]

約数ペア:

[(1, 21095757), (3, 7031919), (9, 2343973), (19, 1110303), (43, 490599), (57, 370101), (129, 163533), (151, 139707), (171, 123367), (361, 58437), (387, 54511), (453, 46569), (817, 25821), (1083, 19479), (1359, 15523), (2451, 8607), (2869, 7353), (3249, 6493)]