19979800

素因数分解:

$2^3\times 5^2\times {\mathrm{283}}^1\times {\mathrm{353}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 46749240

約数和(自身を除く): 26769440

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 283, 353, 566, 706, 1132, 1412, 1415, 1765, 2264, 2824, 2830, 3530, 5660, 7060, 7075, 8825, 11320, 14120, 14150, 17650, 28300, 35300, 56600, 70600, 99899, 199798, 399596, 499495, 799192, 998990, 1997980, 2497475, 3995960, 4994950, 9989900, 19979800]

約数ペア:

[(1, 19979800), (2, 9989900), (4, 4994950), (5, 3995960), (8, 2497475), (10, 1997980), (20, 998990), (25, 799192), (40, 499495), (50, 399596), (100, 199798), (200, 99899), (283, 70600), (353, 56600), (566, 35300), (706, 28300), (1132, 17650), (1412, 14150), (1415, 14120), (1765, 11320), (2264, 8825), (2824, 7075), (2830, 7060), (3530, 5660)]