21138831

素因数分解:

$3^2\times 7^1\times {\mathrm{421}}^1\times {\mathrm{797}}^1$

素因数の和:1231

約数の個数: 24

約数和(自身を含む): 35022624

約数和(自身を除く): 13883793

約数列:

[1, 3, 7, 9, 21, 63, 421, 797, 1263, 2391, 2947, 3789, 5579, 7173, 8841, 16737, 26523, 50211, 335537, 1006611, 2348759, 3019833, 7046277, 21138831]

約数ペア:

[(1, 21138831), (3, 7046277), (7, 3019833), (9, 2348759), (21, 1006611), (63, 335537), (421, 50211), (797, 26523), (1263, 16737), (2391, 8841), (2947, 7173), (3789, 5579)]