28909780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20359}}^1$

素因数の和:20439

約数の個数: 24

約数和(自身を含む): 61568640

約数和(自身を除く): 32658860

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 20359, 40718, 81436, 101795, 203590, 407180, 1445489, 2890978, 5781956, 7227445, 14454890, 28909780]

約数ペア:

[(1, 28909780), (2, 14454890), (4, 7227445), (5, 5781956), (10, 2890978), (20, 1445489), (71, 407180), (142, 203590), (284, 101795), (355, 81436), (710, 40718), (1420, 20359)]