21226401

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:315

約数の個数: 64

約数和(自身を含む): 39628800

約数和(自身を除く): 18402399

約数列:

[1, 3, 7, 9, 19, 21, 23, 27, 57, 63, 69, 133, 161, 171, 189, 207, 257, 399, 437, 483, 513, 621, 771, 1197, 1311, 1449, 1799, 2313, 3059, 3591, 3933, 4347, 4883, 5397, 5911, 6939, 9177, 11799, 14649, 16191, 17733, 27531, 34181, 41377, 43947, 48573, 53199, 82593, 102543, 112309, 124131, 131841, 159597, 307629, 336927, 372393, 786163, 922887, 1010781, 1117179, 2358489, 3032343, 7075467, 21226401]

約数ペア:

[(1, 21226401), (3, 7075467), (7, 3032343), (9, 2358489), (19, 1117179), (21, 1010781), (23, 922887), (27, 786163), (57, 372393), (63, 336927), (69, 307629), (133, 159597), (161, 131841), (171, 124131), (189, 112309), (207, 102543), (257, 82593), (399, 53199), (437, 48573), (483, 43947), (513, 41377), (621, 34181), (771, 27531), (1197, 17733), (1311, 16191), (1449, 14649), (1799, 11799), (2313, 9177), (3059, 6939), (3591, 5911), (3933, 5397), (4347, 4883)]