21059073

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{53}}^2$

素因数の和:143

約数の個数: 54

約数和(自身を含む): 38186694

約数和(自身を除く): 17127621

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 53, 63, 119, 147, 153, 159, 357, 371, 441, 477, 833, 901, 1071, 1113, 2499, 2597, 2703, 2809, 3339, 6307, 7497, 7791, 8109, 8427, 18921, 19663, 23373, 25281, 44149, 47753, 56763, 58989, 132447, 137641, 143259, 176967, 334271, 397341, 412923, 429777, 1002813, 1238769, 2339897, 3008439, 7019691, 21059073]

約数ペア:

[(1, 21059073), (3, 7019691), (7, 3008439), (9, 2339897), (17, 1238769), (21, 1002813), (49, 429777), (51, 412923), (53, 397341), (63, 334271), (119, 176967), (147, 143259), (153, 137641), (159, 132447), (357, 58989), (371, 56763), (441, 47753), (477, 44149), (833, 25281), (901, 23373), (1071, 19663), (1113, 18921), (2499, 8427), (2597, 8109), (2703, 7791), (2809, 7497), (3339, 6307)]