21057509193

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7895579}}^1$

素因数の和:7895716

約数の個数: 16

約数和(自身を含む): 32340295680

約数和(自身を除く): 11282786487

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7895579, 23686737, 55269053, 165807159, 1002738533, 3008215599, 7019169731, 21057509193]

約数ペア:

[(1, 21057509193), (3, 7019169731), (7, 3008215599), (21, 1002738533), (127, 165807159), (381, 55269053), (889, 23686737), (2667, 7895579)]