21278835

素因数分解:

$3^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{967}}^1$

素因数の和:1144

約数の個数: 32

約数和(自身を含む): 38100480

約数和(自身を除く): 16821645

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 163, 489, 815, 967, 1467, 2445, 2901, 4401, 4835, 7335, 8703, 14505, 22005, 26109, 43515, 130545, 157621, 472863, 788105, 1418589, 2364315, 4255767, 7092945, 21278835]

約数ペア:

[(1, 21278835), (3, 7092945), (5, 4255767), (9, 2364315), (15, 1418589), (27, 788105), (45, 472863), (135, 157621), (163, 130545), (489, 43515), (815, 26109), (967, 22005), (1467, 14505), (2445, 8703), (2901, 7335), (4401, 4835)]