19880960

素因数分解:

$2^{10}\times 5^1\times {\mathrm{11}}^1\times {\mathrm{353}}^1$

素因数の和:389

約数の個数: 88

約数和(自身を含む): 52173936

約数和(自身を除く): 32292976

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 353, 440, 512, 640, 704, 706, 880, 1024, 1280, 1408, 1412, 1760, 1765, 2560, 2816, 2824, 3520, 3530, 3883, 5120, 5632, 5648, 7040, 7060, 7766, 11264, 11296, 14080, 14120, 15532, 19415, 22592, 28160, 28240, 31064, 38830, 45184, 56320, 56480, 62128, 77660, 90368, 112960, 124256, 155320, 180736, 225920, 248512, 310640, 361472, 451840, 497024, 621280, 903680, 994048, 1242560, 1807360, 1988096, 2485120, 3976192, 4970240, 9940480, 19880960]

約数ペア:

[(1, 19880960), (2, 9940480), (4, 4970240), (5, 3976192), (8, 2485120), (10, 1988096), (11, 1807360), (16, 1242560), (20, 994048), (22, 903680), (32, 621280), (40, 497024), (44, 451840), (55, 361472), (64, 310640), (80, 248512), (88, 225920), (110, 180736), (128, 155320), (160, 124256), (176, 112960), (220, 90368), (256, 77660), (320, 62128), (352, 56480), (353, 56320), (440, 45184), (512, 38830), (640, 31064), (704, 28240), (706, 28160), (880, 22592), (1024, 19415), (1280, 15532), (1408, 14120), (1412, 14080), (1760, 11296), (1765, 11264), (2560, 7766), (2816, 7060), (2824, 7040), (3520, 5648), (3530, 5632), (3883, 5120)]