21175803

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:145

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 15596037

約数列:

[1, 3, 9, 11, 27, 33, 37, 41, 47, 99, 111, 123, 141, 297, 333, 369, 407, 423, 451, 517, 999, 1107, 1221, 1269, 1353, 1517, 1551, 1739, 1927, 3663, 4059, 4551, 4653, 5217, 5781, 10989, 12177, 13653, 13959, 15651, 16687, 17343, 19129, 21197, 40959, 46953, 50061, 52029, 57387, 63591, 71299, 150183, 172161, 190773, 213897, 450549, 516483, 572319, 641691, 784289, 1925073, 2352867, 7058601, 21175803]

約数ペア:

[(1, 21175803), (3, 7058601), (9, 2352867), (11, 1925073), (27, 784289), (33, 641691), (37, 572319), (41, 516483), (47, 450549), (99, 213897), (111, 190773), (123, 172161), (141, 150183), (297, 71299), (333, 63591), (369, 57387), (407, 52029), (423, 50061), (451, 46953), (517, 40959), (999, 21197), (1107, 19129), (1221, 17343), (1269, 16687), (1353, 15651), (1517, 13959), (1551, 13653), (1739, 12177), (1927, 10989), (3663, 5781), (4059, 5217), (4551, 4653)]