21182455

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2789}}^1$

素因数の和:2839

約数の個数: 24

約数和(自身を含む): 30533760

約数和(自身を除く): 9351305

約数列:

[1, 5, 7, 31, 35, 49, 155, 217, 245, 1085, 1519, 2789, 7595, 13945, 19523, 86459, 97615, 136661, 432295, 605213, 683305, 3026065, 4236491, 21182455]

約数ペア:

[(1, 21182455), (5, 4236491), (7, 3026065), (31, 683305), (35, 605213), (49, 432295), (155, 136661), (217, 97615), (245, 86459), (1085, 19523), (1519, 13945), (2789, 7595)]