21307881

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{461}}^1$

素因数の和:573

約数の個数: 32

約数和(自身を含む): 34062336

約数和(自身を除く): 12754455

約数列:

[1, 3, 7, 21, 31, 71, 93, 213, 217, 461, 497, 651, 1383, 1491, 2201, 3227, 6603, 9681, 14291, 15407, 32731, 42873, 46221, 98193, 100037, 229117, 300111, 687351, 1014661, 3043983, 7102627, 21307881]

約数ペア:

[(1, 21307881), (3, 7102627), (7, 3043983), (21, 1014661), (31, 687351), (71, 300111), (93, 229117), (213, 100037), (217, 98193), (461, 46221), (497, 42873), (651, 32731), (1383, 15407), (1491, 14291), (2201, 9681), (3227, 6603)]