21131361

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{6067}}^1$

素因数の和:6122

約数の個数: 20

約数和(自身を含む): 32306032

約数和(自身を除く): 11174671

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 6067, 18201, 54603, 163809, 260881, 491427, 782643, 2347929, 7043787, 21131361]

約数ペア:

[(1, 21131361), (3, 7043787), (9, 2347929), (27, 782643), (43, 491427), (81, 260881), (129, 163809), (387, 54603), (1161, 18201), (3483, 6067)]