28760920

素因数分解:

$2^3\times 5^1\times {\mathrm{839}}^1\times {\mathrm{857}}^1$

素因数の和:1707

約数の個数: 32

約数和(自身を含む): 64864800

約数和(自身を除く): 36103880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 839, 857, 1678, 1714, 3356, 3428, 4195, 4285, 6712, 6856, 8390, 8570, 16780, 17140, 33560, 34280, 719023, 1438046, 2876092, 3595115, 5752184, 7190230, 14380460, 28760920]

約数ペア:

[(1, 28760920), (2, 14380460), (4, 7190230), (5, 5752184), (8, 3595115), (10, 2876092), (20, 1438046), (40, 719023), (839, 34280), (857, 33560), (1678, 17140), (1714, 16780), (3356, 8570), (3428, 8390), (4195, 6856), (4285, 6712)]