21810640

素因数分解:

$2^4\times 5^1\times {\mathrm{337}}^1\times {\mathrm{809}}^1$

素因数の和:1159

約数の個数: 40

約数和(自身を含む): 50923080

約数和(自身を除く): 29112440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 337, 674, 809, 1348, 1618, 1685, 2696, 3236, 3370, 4045, 5392, 6472, 6740, 8090, 12944, 13480, 16180, 26960, 32360, 64720, 272633, 545266, 1090532, 1363165, 2181064, 2726330, 4362128, 5452660, 10905320, 21810640]

約数ペア:

[(1, 21810640), (2, 10905320), (4, 5452660), (5, 4362128), (8, 2726330), (10, 2181064), (16, 1363165), (20, 1090532), (40, 545266), (80, 272633), (337, 64720), (674, 32360), (809, 26960), (1348, 16180), (1618, 13480), (1685, 12944), (2696, 8090), (3236, 6740), (3370, 6472), (4045, 5392)]