21110691

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{337}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 34178560

約数和(自身を除く): 13067869

約数列:

[1, 3, 7, 19, 21, 57, 133, 157, 337, 399, 471, 1011, 1099, 2359, 2983, 3297, 6403, 7077, 8949, 19209, 20881, 44821, 52909, 62643, 134463, 158727, 370363, 1005271, 1111089, 3015813, 7036897, 21110691]

約数ペア:

[(1, 21110691), (3, 7036897), (7, 3015813), (19, 1111089), (21, 1005271), (57, 370363), (133, 158727), (157, 134463), (337, 62643), (399, 52909), (471, 44821), (1011, 20881), (1099, 19209), (2359, 8949), (2983, 7077), (3297, 6403)]