21693231

素因数分解:

$3^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{863}}^1$

素因数の和:905

約数の個数: 48

約数和(自身を含む): 39398400

約数和(自身を除く): 17705169

約数列:

[1, 3, 7, 9, 19, 21, 27, 49, 57, 63, 133, 147, 171, 189, 399, 441, 513, 863, 931, 1197, 1323, 2589, 2793, 3591, 6041, 7767, 8379, 16397, 18123, 23301, 25137, 42287, 49191, 54369, 114779, 126861, 147573, 163107, 344337, 380583, 442719, 803453, 1033011, 1141749, 2410359, 3099033, 7231077, 21693231]

約数ペア:

[(1, 21693231), (3, 7231077), (7, 3099033), (9, 2410359), (19, 1141749), (21, 1033011), (27, 803453), (49, 442719), (57, 380583), (63, 344337), (133, 163107), (147, 147573), (171, 126861), (189, 114779), (399, 54369), (441, 49191), (513, 42287), (863, 25137), (931, 23301), (1197, 18123), (1323, 16397), (2589, 8379), (2793, 7767), (3591, 6041)]