12782800

素因数分解:

$2^4\times 5^2\times {\mathrm{31957}}^1$

素因数の和:31975

約数の個数: 30

約数和(自身を含む): 30711638

約数和(自身を除く): 17928838

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 31957, 63914, 127828, 159785, 255656, 319570, 511312, 639140, 798925, 1278280, 1597850, 2556560, 3195700, 6391400, 12782800]

約数ペア:

[(1, 12782800), (2, 6391400), (4, 3195700), (5, 2556560), (8, 1597850), (10, 1278280), (16, 798925), (20, 639140), (25, 511312), (40, 319570), (50, 255656), (80, 159785), (100, 127828), (200, 63914), (400, 31957)]