28907720

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{2609}}^1$

素因数の和:2897

約数の個数: 32

約数和(自身を含む): 65302200

約数和(自身を除く): 36394480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 2216, 2609, 2770, 5218, 5540, 10436, 11080, 13045, 20872, 26090, 52180, 104360, 722693, 1445386, 2890772, 3613465, 5781544, 7226930, 14453860, 28907720]

約数ペア:

[(1, 28907720), (2, 14453860), (4, 7226930), (5, 5781544), (8, 3613465), (10, 2890772), (20, 1445386), (40, 722693), (277, 104360), (554, 52180), (1108, 26090), (1385, 20872), (2216, 13045), (2609, 11080), (2770, 10436), (5218, 5540)]