28807840

素因数分解:

$2^5\times 5^1\times {\mathrm{401}}^1\times {\mathrm{449}}^1$

素因数の和:865

約数の個数: 48

約数和(自身を含む): 68380200

約数和(自身を除く): 39572360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 401, 449, 802, 898, 1604, 1796, 2005, 2245, 3208, 3592, 4010, 4490, 6416, 7184, 8020, 8980, 12832, 14368, 16040, 17960, 32080, 35920, 64160, 71840, 180049, 360098, 720196, 900245, 1440392, 1800490, 2880784, 3600980, 5761568, 7201960, 14403920, 28807840]

約数ペア:

[(1, 28807840), (2, 14403920), (4, 7201960), (5, 5761568), (8, 3600980), (10, 2880784), (16, 1800490), (20, 1440392), (32, 900245), (40, 720196), (80, 360098), (160, 180049), (401, 71840), (449, 64160), (802, 35920), (898, 32080), (1604, 17960), (1796, 16040), (2005, 14368), (2245, 12832), (3208, 8980), (3592, 8020), (4010, 7184), (4490, 6416)]