19784240

素因数分解:

$2^4\times 5^1\times 7^4\times {\mathrm{103}}^1$

素因数の和:144

約数の個数: 100

約数和(自身を含む): 54182544

約数和(自身を除く): 34398304

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 103, 112, 140, 196, 206, 245, 280, 343, 392, 412, 490, 515, 560, 686, 721, 784, 824, 980, 1030, 1372, 1442, 1648, 1715, 1960, 2060, 2401, 2744, 2884, 3430, 3605, 3920, 4120, 4802, 5047, 5488, 5768, 6860, 7210, 8240, 9604, 10094, 11536, 12005, 13720, 14420, 19208, 20188, 24010, 25235, 27440, 28840, 35329, 38416, 40376, 48020, 50470, 57680, 70658, 80752, 96040, 100940, 141316, 176645, 192080, 201880, 247303, 282632, 353290, 403760, 494606, 565264, 706580, 989212, 1236515, 1413160, 1978424, 2473030, 2826320, 3956848, 4946060, 9892120, 19784240]

約数ペア:

[(1, 19784240), (2, 9892120), (4, 4946060), (5, 3956848), (7, 2826320), (8, 2473030), (10, 1978424), (14, 1413160), (16, 1236515), (20, 989212), (28, 706580), (35, 565264), (40, 494606), (49, 403760), (56, 353290), (70, 282632), (80, 247303), (98, 201880), (103, 192080), (112, 176645), (140, 141316), (196, 100940), (206, 96040), (245, 80752), (280, 70658), (343, 57680), (392, 50470), (412, 48020), (490, 40376), (515, 38416), (560, 35329), (686, 28840), (721, 27440), (784, 25235), (824, 24010), (980, 20188), (1030, 19208), (1372, 14420), (1442, 13720), (1648, 12005), (1715, 11536), (1960, 10094), (2060, 9604), (2401, 8240), (2744, 7210), (2884, 6860), (3430, 5768), (3605, 5488), (3920, 5047), (4120, 4802)]