21172158

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{79}}^1\times {\mathrm{709}}^1$

素因数の和:806

約数の個数: 64

約数和(自身を含む): 54528000

約数和(自身を除く): 33355842

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 79, 126, 158, 189, 237, 378, 474, 553, 709, 711, 1106, 1418, 1422, 1659, 2127, 2133, 3318, 4254, 4266, 4963, 4977, 6381, 9926, 9954, 12762, 14889, 14931, 19143, 29778, 29862, 38286, 44667, 56011, 89334, 112022, 134001, 168033, 268002, 336066, 392077, 504099, 784154, 1008198, 1176231, 1512297, 2352462, 3024594, 3528693, 7057386, 10586079, 21172158]

約数ペア:

[(1, 21172158), (2, 10586079), (3, 7057386), (6, 3528693), (7, 3024594), (9, 2352462), (14, 1512297), (18, 1176231), (21, 1008198), (27, 784154), (42, 504099), (54, 392077), (63, 336066), (79, 268002), (126, 168033), (158, 134001), (189, 112022), (237, 89334), (378, 56011), (474, 44667), (553, 38286), (709, 29862), (711, 29778), (1106, 19143), (1418, 14931), (1422, 14889), (1659, 12762), (2127, 9954), (2133, 9926), (3318, 6381), (4254, 4977), (4266, 4963)]