21555861

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{4787}}^1$

素因数の和:4888

約数の個数: 16

約数和(自身を含む): 30643200

約数和(自身を除く): 9087339

約数列:

[1, 3, 19, 57, 79, 237, 1501, 4503, 4787, 14361, 90953, 272859, 378173, 1134519, 7185287, 21555861]

約数ペア:

[(1, 21555861), (3, 7185287), (19, 1134519), (57, 378173), (79, 272859), (237, 90953), (1501, 14361), (4503, 4787)]