21279160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75997}}^1$

素因数の和:76015

約数の個数: 32

約数和(自身を含む): 54718560

約数和(自身を除く): 33439400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75997, 151994, 303988, 379985, 531979, 607976, 759970, 1063958, 1519940, 2127916, 2659895, 3039880, 4255832, 5319790, 10639580, 21279160]

約数ペア:

[(1, 21279160), (2, 10639580), (4, 5319790), (5, 4255832), (7, 3039880), (8, 2659895), (10, 2127916), (14, 1519940), (20, 1063958), (28, 759970), (35, 607976), (40, 531979), (56, 379985), (70, 303988), (140, 151994), (280, 75997)]