21605049

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{6203}}^1$

素因数の和:6258

約数の個数: 20

約数和(自身を含む): 33030096

約数和(自身を除く): 11425047

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 6203, 18609, 55827, 167481, 266729, 502443, 800187, 2400561, 7201683, 21605049]

約数ペア:

[(1, 21605049), (3, 7201683), (9, 2400561), (27, 800187), (43, 502443), (81, 266729), (129, 167481), (387, 55827), (1161, 18609), (3483, 6203)]