21166557

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1\times {\mathrm{557}}^1$

素因数の和:852

約数の個数: 16

約数和(自身を含む): 28926720

約数和(自身を除く): 7760163

約数列:

[1, 3, 53, 159, 239, 557, 717, 1671, 12667, 29521, 38001, 88563, 133123, 399369, 7055519, 21166557]

約数ペア:

[(1, 21166557), (3, 7055519), (53, 399369), (159, 133123), (239, 88563), (557, 38001), (717, 29521), (1671, 12667)]