21236961

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{173}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 31570560

約数和(自身を除く): 10333599

約数列:

[1, 3, 17, 29, 51, 83, 87, 173, 249, 493, 519, 1411, 1479, 2407, 2941, 4233, 5017, 7221, 8823, 14359, 15051, 40919, 43077, 85289, 122757, 244103, 255867, 416411, 732309, 1249233, 7078987, 21236961]

約数ペア:

[(1, 21236961), (3, 7078987), (17, 1249233), (29, 732309), (51, 416411), (83, 255867), (87, 244103), (173, 122757), (249, 85289), (493, 43077), (519, 40919), (1411, 15051), (1479, 14359), (2407, 8823), (2941, 7221), (4233, 5017)]