21041559

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{349}}^1$

素因数の和:405

約数の個数: 64

約数和(自身を含む): 40320000

約数和(自身を除く): 19278441

約数列:

[1, 3, 7, 9, 11, 21, 27, 29, 33, 63, 77, 87, 99, 189, 203, 231, 261, 297, 319, 349, 609, 693, 783, 957, 1047, 1827, 2079, 2233, 2443, 2871, 3141, 3839, 5481, 6699, 7329, 8613, 9423, 10121, 11517, 20097, 21987, 26873, 30363, 34551, 60291, 65961, 70847, 80619, 91089, 103653, 111331, 212541, 241857, 273267, 333993, 637623, 725571, 779317, 1001979, 1912869, 2337951, 3005937, 7013853, 21041559]

約数ペア:

[(1, 21041559), (3, 7013853), (7, 3005937), (9, 2337951), (11, 1912869), (21, 1001979), (27, 779317), (29, 725571), (33, 637623), (63, 333993), (77, 273267), (87, 241857), (99, 212541), (189, 111331), (203, 103653), (231, 91089), (261, 80619), (297, 70847), (319, 65961), (349, 60291), (609, 34551), (693, 30363), (783, 26873), (957, 21987), (1047, 20097), (1827, 11517), (2079, 10121), (2233, 9423), (2443, 8613), (2871, 7329), (3141, 6699), (3839, 5481)]