20964220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1283}}^1$

素因数の和:1354

約数の個数: 48

約数和(自身を含む): 47456640

約数和(自身を除く): 26492420

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1283, 1634, 2566, 3268, 4085, 5132, 6415, 8170, 12830, 16340, 24377, 25660, 48754, 55169, 97508, 110338, 121885, 220676, 243770, 275845, 487540, 551690, 1048211, 1103380, 2096422, 4192844, 5241055, 10482110, 20964220]

約数ペア:

[(1, 20964220), (2, 10482110), (4, 5241055), (5, 4192844), (10, 2096422), (19, 1103380), (20, 1048211), (38, 551690), (43, 487540), (76, 275845), (86, 243770), (95, 220676), (172, 121885), (190, 110338), (215, 97508), (380, 55169), (430, 48754), (817, 25660), (860, 24377), (1283, 16340), (1634, 12830), (2566, 8170), (3268, 6415), (4085, 5132)]