20528068420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{645131}}^1$

素因数の和:645220

約数の個数: 48

約数和(自身を含む): 45303749568

約数和(自身を除く): 24775681148

約数列:

[1, 2, 4, 5, 10, 20, 37, 43, 74, 86, 148, 172, 185, 215, 370, 430, 740, 860, 1591, 3182, 6364, 7955, 15910, 31820, 645131, 1290262, 2580524, 3225655, 6451310, 12902620, 23869847, 27740633, 47739694, 55481266, 95479388, 110962532, 119349235, 138703165, 238698470, 277406330, 477396940, 554812660, 1026403421, 2052806842, 4105613684, 5132017105, 10264034210, 20528068420]

約数ペア:

[(1, 20528068420), (2, 10264034210), (4, 5132017105), (5, 4105613684), (10, 2052806842), (20, 1026403421), (37, 554812660), (43, 477396940), (74, 277406330), (86, 238698470), (148, 138703165), (172, 119349235), (185, 110962532), (215, 95479388), (370, 55481266), (430, 47739694), (740, 27740633), (860, 23869847), (1591, 12902620), (3182, 6451310), (6364, 3225655), (7955, 2580524), (15910, 1290262), (31820, 645131)]