21665567

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{251}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7364833

約数列:

[1, 7, 11, 19, 59, 77, 133, 209, 251, 413, 649, 1121, 1463, 1757, 2761, 4543, 4769, 7847, 12331, 14809, 19327, 33383, 52459, 86317, 103663, 162899, 281371, 367213, 1140293, 1969597, 3095081, 21665567]

約数ペア:

[(1, 21665567), (7, 3095081), (11, 1969597), (19, 1140293), (59, 367213), (77, 281371), (133, 162899), (209, 103663), (251, 86317), (413, 52459), (649, 33383), (1121, 19327), (1463, 14809), (1757, 12331), (2761, 7847), (4543, 4769)]