21881211

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{227}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 33619968

約数和(自身を除く): 11738757

約数列:

[1, 3, 11, 23, 33, 69, 127, 227, 253, 381, 681, 759, 1397, 2497, 2921, 4191, 5221, 7491, 8763, 15663, 28829, 32131, 57431, 86487, 96393, 172293, 317119, 663067, 951357, 1989201, 7293737, 21881211]

約数ペア:

[(1, 21881211), (3, 7293737), (11, 1989201), (23, 951357), (33, 663067), (69, 317119), (127, 172293), (227, 96393), (253, 86487), (381, 57431), (681, 32131), (759, 28829), (1397, 15663), (2497, 8763), (2921, 7491), (4191, 5221)]