21145565

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19489}}^1$

素因数の和:19532

約数の個数: 16

約数和(自身を含む): 29936640

約数和(自身を除く): 8791075

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19489, 97445, 136423, 604159, 682115, 3020795, 4229113, 21145565]

約数ペア:

[(1, 21145565), (5, 4229113), (7, 3020795), (31, 682115), (35, 604159), (155, 136423), (217, 97445), (1085, 19489)]