21551427

素因数分解:

$3^6\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:119

約数の個数: 56

約数和(自身を含む): 35885376

約数和(自身を除く): 14333949

約数列:

[1, 3, 9, 17, 27, 37, 47, 51, 81, 111, 141, 153, 243, 333, 423, 459, 629, 729, 799, 999, 1269, 1377, 1739, 1887, 2397, 2997, 3807, 4131, 5217, 5661, 7191, 8991, 11421, 12393, 15651, 16983, 21573, 26973, 29563, 34263, 46953, 50949, 64719, 88689, 140859, 152847, 194157, 266067, 422577, 458541, 582471, 798201, 1267731, 2394603, 7183809, 21551427]

約数ペア:

[(1, 21551427), (3, 7183809), (9, 2394603), (17, 1267731), (27, 798201), (37, 582471), (47, 458541), (51, 422577), (81, 266067), (111, 194157), (141, 152847), (153, 140859), (243, 88689), (333, 64719), (423, 50949), (459, 46953), (629, 34263), (729, 29563), (799, 26973), (999, 21573), (1269, 16983), (1377, 15651), (1739, 12393), (1887, 11421), (2397, 8991), (2997, 7191), (3807, 5661), (4131, 5217)]