28909880

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{7451}}^1$

素因数の和:7559

約数の個数: 32

約数和(自身を含む): 65726640

約数和(自身を除く): 36816760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 7451, 14902, 29804, 37255, 59608, 74510, 149020, 298040, 722747, 1445494, 2890988, 3613735, 5781976, 7227470, 14454940, 28909880]

約数ペア:

[(1, 28909880), (2, 14454940), (4, 7227470), (5, 5781976), (8, 3613735), (10, 2890988), (20, 1445494), (40, 722747), (97, 298040), (194, 149020), (388, 74510), (485, 59608), (776, 37255), (970, 29804), (1940, 14902), (3880, 7451)]