21108087

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:122

約数の個数: 96

約数和(自身を含む): 42900480

約数和(自身を除く): 21792393

約数列:

[1, 3, 7, 9, 11, 13, 21, 27, 33, 39, 63, 71, 77, 91, 99, 117, 121, 143, 189, 213, 231, 273, 297, 351, 363, 429, 497, 639, 693, 781, 819, 847, 923, 1001, 1089, 1287, 1491, 1573, 1917, 2079, 2343, 2457, 2541, 2769, 3003, 3267, 3861, 4473, 4719, 5467, 6461, 7029, 7623, 8307, 8591, 9009, 10153, 11011, 13419, 14157, 16401, 19383, 21087, 22869, 24921, 25773, 27027, 30459, 33033, 42471, 49203, 58149, 60137, 71071, 77319, 91377, 99099, 111683, 147609, 174447, 180411, 213213, 231957, 274131, 297297, 335049, 541233, 639639, 781781, 1005147, 1623699, 1918917, 2345343, 3015441, 7036029, 21108087]

約数ペア:

[(1, 21108087), (3, 7036029), (7, 3015441), (9, 2345343), (11, 1918917), (13, 1623699), (21, 1005147), (27, 781781), (33, 639639), (39, 541233), (63, 335049), (71, 297297), (77, 274131), (91, 231957), (99, 213213), (117, 180411), (121, 174447), (143, 147609), (189, 111683), (213, 99099), (231, 91377), (273, 77319), (297, 71071), (351, 60137), (363, 58149), (429, 49203), (497, 42471), (639, 33033), (693, 30459), (781, 27027), (819, 25773), (847, 24921), (923, 22869), (1001, 21087), (1089, 19383), (1287, 16401), (1491, 14157), (1573, 13419), (1917, 11011), (2079, 10153), (2343, 9009), (2457, 8591), (2541, 8307), (2769, 7623), (3003, 7029), (3267, 6461), (3861, 5467), (4473, 4719)]