28512040

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{8009}}^1$

素因数の和:8109

約数の個数: 32

約数和(自身を含む): 64881000

約数和(自身を除く): 36368960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 8009, 16018, 32036, 40045, 64072, 80090, 160180, 320360, 712801, 1425602, 2851204, 3564005, 5702408, 7128010, 14256020, 28512040]

約数ペア:

[(1, 28512040), (2, 14256020), (4, 7128010), (5, 5702408), (8, 3564005), (10, 2851204), (20, 1425602), (40, 712801), (89, 320360), (178, 160180), (356, 80090), (445, 64072), (712, 40045), (890, 32036), (1780, 16018), (3560, 8009)]