21249306

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1279}}^1$

素因数の和:1371

約数の個数: 48

約数和(自身を含む): 50319360

約数和(自身を除く): 29070054

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 71, 78, 117, 142, 213, 234, 426, 639, 923, 1278, 1279, 1846, 2558, 2769, 3837, 5538, 7674, 8307, 11511, 16614, 16627, 23022, 33254, 49881, 90809, 99762, 149643, 181618, 272427, 299286, 544854, 817281, 1180517, 1634562, 2361034, 3541551, 7083102, 10624653, 21249306]

約数ペア:

[(1, 21249306), (2, 10624653), (3, 7083102), (6, 3541551), (9, 2361034), (13, 1634562), (18, 1180517), (26, 817281), (39, 544854), (71, 299286), (78, 272427), (117, 181618), (142, 149643), (213, 99762), (234, 90809), (426, 49881), (639, 33254), (923, 23022), (1278, 16627), (1279, 16614), (1846, 11511), (2558, 8307), (2769, 7674), (3837, 5538)]