20535080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11939}}^1$

素因数の和:11993

約数の個数: 32

約数和(自身を含む): 47282400

約数和(自身を除く): 26747320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11939, 23878, 47756, 59695, 95512, 119390, 238780, 477560, 513377, 1026754, 2053508, 2566885, 4107016, 5133770, 10267540, 20535080]

約数ペア:

[(1, 20535080), (2, 10267540), (4, 5133770), (5, 4107016), (8, 2566885), (10, 2053508), (20, 1026754), (40, 513377), (43, 477560), (86, 238780), (172, 119390), (215, 95512), (344, 59695), (430, 47756), (860, 23878), (1720, 11939)]