20885769

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{331}}^1$

素因数の和:403

約数の個数: 40

約数和(自身を含む): 33744480

約数和(自身を除く): 12858711

約数列:

[1, 3, 9, 19, 27, 41, 57, 81, 123, 171, 331, 369, 513, 779, 993, 1107, 1539, 2337, 2979, 3321, 6289, 7011, 8937, 13571, 18867, 21033, 26811, 40713, 56601, 63099, 122139, 169803, 257849, 366417, 509409, 773547, 1099251, 2320641, 6961923, 20885769]

約数ペア:

[(1, 20885769), (3, 6961923), (9, 2320641), (19, 1099251), (27, 773547), (41, 509409), (57, 366417), (81, 257849), (123, 169803), (171, 122139), (331, 63099), (369, 56601), (513, 40713), (779, 26811), (993, 21033), (1107, 18867), (1539, 13571), (2337, 8937), (2979, 7011), (3321, 6289)]