21180897

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{229}}^1\times {\mathrm{239}}^1$

素因数の和:517

約数の個数: 24

約数和(自身を含む): 31574400

約数和(自身を除く): 10393503

約数列:

[1, 3, 9, 43, 129, 229, 239, 387, 687, 717, 2061, 2151, 9847, 10277, 29541, 30831, 54731, 88623, 92493, 164193, 492579, 2353433, 7060299, 21180897]

約数ペア:

[(1, 21180897), (3, 7060299), (9, 2353433), (43, 492579), (129, 164193), (229, 92493), (239, 88623), (387, 54731), (687, 30831), (717, 29541), (2061, 10277), (2151, 9847)]