21640325

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{3989}}^1$

素因数の和:4037

約数の個数: 24

約数和(自身を含む): 31664640

約数和(自身を除く): 10024315

約数列:

[1, 5, 7, 25, 31, 35, 155, 175, 217, 775, 1085, 3989, 5425, 19945, 27923, 99725, 123659, 139615, 618295, 698075, 865613, 3091475, 4328065, 21640325]

約数ペア:

[(1, 21640325), (5, 4328065), (7, 3091475), (25, 865613), (31, 698075), (35, 618295), (155, 139615), (175, 123659), (217, 99725), (775, 27923), (1085, 19945), (3989, 5425)]