21781144

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1861}}^1$

素因数の和:1904

約数の個数: 64

約数和(自身を含む): 53625600

約数和(自身を除く): 31844456

約数列:

[1, 2, 4, 7, 8, 11, 14, 19, 22, 28, 38, 44, 56, 76, 77, 88, 133, 152, 154, 209, 266, 308, 418, 532, 616, 836, 1064, 1463, 1672, 1861, 2926, 3722, 5852, 7444, 11704, 13027, 14888, 20471, 26054, 35359, 40942, 52108, 70718, 81884, 104216, 141436, 143297, 163768, 247513, 282872, 286594, 388949, 495026, 573188, 777898, 990052, 1146376, 1555796, 1980104, 2722643, 3111592, 5445286, 10890572, 21781144]

約数ペア:

[(1, 21781144), (2, 10890572), (4, 5445286), (7, 3111592), (8, 2722643), (11, 1980104), (14, 1555796), (19, 1146376), (22, 990052), (28, 777898), (38, 573188), (44, 495026), (56, 388949), (76, 286594), (77, 282872), (88, 247513), (133, 163768), (152, 143297), (154, 141436), (209, 104216), (266, 81884), (308, 70718), (418, 52108), (532, 40942), (616, 35359), (836, 26054), (1064, 20471), (1463, 14888), (1672, 13027), (1861, 11704), (2926, 7444), (3722, 5852)]