20408720

素因数分解:

$2^4\times 5^1\times {\mathrm{337}}^1\times {\mathrm{757}}^1$

素因数の和:1107

約数の個数: 40

約数和(自身を含む): 47653944

約数和(自身を除く): 27245224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 337, 674, 757, 1348, 1514, 1685, 2696, 3028, 3370, 3785, 5392, 6056, 6740, 7570, 12112, 13480, 15140, 26960, 30280, 60560, 255109, 510218, 1020436, 1275545, 2040872, 2551090, 4081744, 5102180, 10204360, 20408720]

約数ペア:

[(1, 20408720), (2, 10204360), (4, 5102180), (5, 4081744), (8, 2551090), (10, 2040872), (16, 1275545), (20, 1020436), (40, 510218), (80, 255109), (337, 60560), (674, 30280), (757, 26960), (1348, 15140), (1514, 13480), (1685, 12112), (2696, 7570), (3028, 6740), (3370, 6056), (3785, 5392)]