21386673

素因数分解:

$3^7\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1$

素因数の和:166

約数の個数: 64

約数和(自身を含む): 40304640

約数和(自身を除く): 18917967

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 81, 99, 127, 189, 231, 243, 297, 381, 567, 693, 729, 889, 891, 1143, 1397, 1701, 2079, 2187, 2667, 2673, 3429, 4191, 5103, 6237, 8001, 8019, 9779, 10287, 12573, 15309, 18711, 24003, 24057, 29337, 30861, 37719, 56133, 72009, 88011, 92583, 113157, 168399, 216027, 264033, 277749, 339471, 648081, 792099, 1018413, 1944243, 2376297, 3055239, 7128891, 21386673]

約数ペア:

[(1, 21386673), (3, 7128891), (7, 3055239), (9, 2376297), (11, 1944243), (21, 1018413), (27, 792099), (33, 648081), (63, 339471), (77, 277749), (81, 264033), (99, 216027), (127, 168399), (189, 113157), (231, 92583), (243, 88011), (297, 72009), (381, 56133), (567, 37719), (693, 30861), (729, 29337), (889, 24057), (891, 24003), (1143, 18711), (1397, 15309), (1701, 12573), (2079, 10287), (2187, 9779), (2667, 8019), (2673, 8001), (3429, 6237), (4191, 5103)]