21724857

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1$

素因数の和:123

約数の個数: 96

約数和(自身を含む): 43130880

約数和(自身を除く): 21406023

約数列:

[1, 3, 7, 9, 11, 21, 23, 29, 33, 47, 63, 69, 77, 87, 99, 141, 161, 203, 207, 231, 253, 261, 319, 329, 423, 483, 517, 609, 667, 693, 759, 957, 987, 1081, 1363, 1449, 1551, 1771, 1827, 2001, 2233, 2277, 2871, 2961, 3243, 3619, 4089, 4653, 4669, 5313, 6003, 6699, 7337, 7567, 9541, 9729, 10857, 11891, 12267, 14007, 14993, 15939, 20097, 22011, 22701, 28623, 31349, 32571, 35673, 42021, 44979, 51359, 66033, 68103, 83237, 85869, 94047, 104951, 107019, 134937, 154077, 219443, 249711, 282141, 314853, 344839, 462231, 658329, 749133, 944559, 1034517, 1974987, 2413873, 3103551, 7241619, 21724857]

約数ペア:

[(1, 21724857), (3, 7241619), (7, 3103551), (9, 2413873), (11, 1974987), (21, 1034517), (23, 944559), (29, 749133), (33, 658329), (47, 462231), (63, 344839), (69, 314853), (77, 282141), (87, 249711), (99, 219443), (141, 154077), (161, 134937), (203, 107019), (207, 104951), (231, 94047), (253, 85869), (261, 83237), (319, 68103), (329, 66033), (423, 51359), (483, 44979), (517, 42021), (609, 35673), (667, 32571), (693, 31349), (759, 28623), (957, 22701), (987, 22011), (1081, 20097), (1363, 15939), (1449, 14993), (1551, 14007), (1771, 12267), (1827, 11891), (2001, 10857), (2233, 9729), (2277, 9541), (2871, 7567), (2961, 7337), (3243, 6699), (3619, 6003), (4089, 5313), (4653, 4669)]