19723221

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6661}}^1$

素因数の和:6721

約数の個数: 24

約数和(自身を含む): 33256704

約数和(自身を除く): 13533483

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 6661, 19983, 46627, 59949, 139881, 313067, 419643, 939201, 2191469, 2817603, 6574407, 19723221]

約数ペア:

[(1, 19723221), (3, 6574407), (7, 2817603), (9, 2191469), (21, 939201), (47, 419643), (63, 313067), (141, 139881), (329, 59949), (423, 46627), (987, 19983), (2961, 6661)]