20721339

素因数分解:

$3^5\times {\mathrm{269}}^1\times {\mathrm{317}}^1$

素因数の和:601

約数の個数: 24

約数和(自身を含む): 31253040

約数和(自身を除く): 10531701

約数列:

[1, 3, 9, 27, 81, 243, 269, 317, 807, 951, 2421, 2853, 7263, 8559, 21789, 25677, 65367, 77031, 85273, 255819, 767457, 2302371, 6907113, 20721339]

約数ペア:

[(1, 20721339), (3, 6907113), (9, 2302371), (27, 767457), (81, 255819), (243, 85273), (269, 77031), (317, 65367), (807, 25677), (951, 21789), (2421, 8559), (2853, 7263)]