21508281

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{997}}^1$

素因数の和:1070

約数の個数: 32

約数和(自身を含む): 34490880

約数和(自身を除く): 12982599

約数列:

[1, 3, 9, 17, 27, 47, 51, 141, 153, 423, 459, 799, 997, 1269, 2397, 2991, 7191, 8973, 16949, 21573, 26919, 46859, 50847, 140577, 152541, 421731, 457623, 796603, 1265193, 2389809, 7169427, 21508281]

約数ペア:

[(1, 21508281), (3, 7169427), (9, 2389809), (17, 1265193), (27, 796603), (47, 457623), (51, 421731), (141, 152541), (153, 140577), (423, 50847), (459, 46859), (799, 26919), (997, 21573), (1269, 16949), (2397, 8973), (2991, 7191)]