21311217

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{7331}}^1$

素因数の和:7373

約数の個数: 24

約数和(自身を含む): 34313760

約数和(自身を除く): 13002543

約数列:

[1, 3, 9, 17, 19, 51, 57, 153, 171, 323, 969, 2907, 7331, 21993, 65979, 124627, 139289, 373881, 417867, 1121643, 1253601, 2367913, 7103739, 21311217]

約数ペア:

[(1, 21311217), (3, 7103739), (9, 2367913), (17, 1253601), (19, 1121643), (51, 417867), (57, 373881), (153, 139289), (171, 124627), (323, 65979), (969, 21993), (2907, 7331)]