21669291

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{421}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 38621440

約数和(自身を除く): 16952149

約数列:

[1, 3, 7, 9, 19, 21, 43, 57, 63, 129, 133, 171, 301, 387, 399, 421, 817, 903, 1197, 1263, 2451, 2709, 2947, 3789, 5719, 7353, 7999, 8841, 17157, 18103, 23997, 26523, 51471, 54309, 55993, 71991, 126721, 162927, 167979, 343957, 380163, 503937, 1031871, 1140489, 2407699, 3095613, 7223097, 21669291]

約数ペア:

[(1, 21669291), (3, 7223097), (7, 3095613), (9, 2407699), (19, 1140489), (21, 1031871), (43, 503937), (57, 380163), (63, 343957), (129, 167979), (133, 162927), (171, 126721), (301, 71991), (387, 55993), (399, 54309), (421, 51471), (817, 26523), (903, 23997), (1197, 18103), (1263, 17157), (2451, 8841), (2709, 7999), (2947, 7353), (3789, 5719)]