21031689

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{52711}}^1$

素因数の和:52740

約数の個数: 16

約数和(自身を含む): 33735680

約数和(自身を除く): 12703991

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 52711, 158133, 368977, 1001509, 1106931, 3004527, 7010563, 21031689]

約数ペア:

[(1, 21031689), (3, 7010563), (7, 3004527), (19, 1106931), (21, 1001509), (57, 368977), (133, 158133), (399, 52711)]