20162840

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1103}}^1$

素因数の和:1571

約数の個数: 32

約数和(自身を含む): 45506880

約数和(自身を除く): 25344040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 1103, 1828, 2206, 2285, 3656, 4412, 4570, 5515, 8824, 9140, 11030, 18280, 22060, 44120, 504071, 1008142, 2016284, 2520355, 4032568, 5040710, 10081420, 20162840]

約数ペア:

[(1, 20162840), (2, 10081420), (4, 5040710), (5, 4032568), (8, 2520355), (10, 2016284), (20, 1008142), (40, 504071), (457, 44120), (914, 22060), (1103, 18280), (1828, 11030), (2206, 9140), (2285, 8824), (3656, 5515), (4412, 4570)]