20385580

素因数分解:

$2^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{4451}}^1$

素因数の和:4689

約数の個数: 24

約数和(自身を含む): 43006320

約数和(自身を除く): 22620740

約数列:

[1, 2, 4, 5, 10, 20, 229, 458, 916, 1145, 2290, 4451, 4580, 8902, 17804, 22255, 44510, 89020, 1019279, 2038558, 4077116, 5096395, 10192790, 20385580]

約数ペア:

[(1, 20385580), (2, 10192790), (4, 5096395), (5, 4077116), (10, 2038558), (20, 1019279), (229, 89020), (458, 44510), (916, 22255), (1145, 17804), (2290, 8902), (4451, 4580)]