21000736491

素因数分解:

$3^1\times 7^3\times {\mathrm{71}}^1\times {\mathrm{287449}}^1$

素因数の和:287544

約数の個数: 32

約数和(自身を含む): 33114240000

約数和(自身を除く): 12113503509

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 343, 497, 1029, 1491, 3479, 10437, 24353, 73059, 287449, 862347, 2012143, 6036429, 14085001, 20408879, 42255003, 61226637, 98595007, 142862153, 295785021, 428586459, 1000035071, 3000105213, 7000245497, 21000736491]

約数ペア:

[(1, 21000736491), (3, 7000245497), (7, 3000105213), (21, 1000035071), (49, 428586459), (71, 295785021), (147, 142862153), (213, 98595007), (343, 61226637), (497, 42255003), (1029, 20408879), (1491, 14085001), (3479, 6036429), (10437, 2012143), (24353, 862347), (73059, 287449)]