18939627

素因数分解:

$3^2\times 7^2\times {\mathrm{67}}^1\times {\mathrm{641}}^1$

素因数の和:728

約数の個数: 36

約数和(自身を含む): 32349096

約数和(自身を除く): 13409469

約数列:

[1, 3, 7, 9, 21, 49, 63, 67, 147, 201, 441, 469, 603, 641, 1407, 1923, 3283, 4221, 4487, 5769, 9849, 13461, 29547, 31409, 40383, 42947, 94227, 128841, 282681, 300629, 386523, 901887, 2104403, 2705661, 6313209, 18939627]

約数ペア:

[(1, 18939627), (3, 6313209), (7, 2705661), (9, 2104403), (21, 901887), (49, 386523), (63, 300629), (67, 282681), (147, 128841), (201, 94227), (441, 42947), (469, 40383), (603, 31409), (641, 29547), (1407, 13461), (1923, 9849), (3283, 5769), (4221, 4487)]