19968872

素因数分解:

$2^3\times 7^2\times {\mathrm{11}}^2\times {\mathrm{421}}^1$

素因数の和:463

約数の個数: 72

約数和(自身を含む): 47987730

約数和(自身を除く): 28018858

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 49, 56, 77, 88, 98, 121, 154, 196, 242, 308, 392, 421, 484, 539, 616, 842, 847, 968, 1078, 1684, 1694, 2156, 2947, 3368, 3388, 4312, 4631, 5894, 5929, 6776, 9262, 11788, 11858, 18524, 20629, 23576, 23716, 32417, 37048, 41258, 47432, 50941, 64834, 82516, 101882, 129668, 165032, 203764, 226919, 259336, 356587, 407528, 453838, 713174, 907676, 1426348, 1815352, 2496109, 2852696, 4992218, 9984436, 19968872]

約数ペア:

[(1, 19968872), (2, 9984436), (4, 4992218), (7, 2852696), (8, 2496109), (11, 1815352), (14, 1426348), (22, 907676), (28, 713174), (44, 453838), (49, 407528), (56, 356587), (77, 259336), (88, 226919), (98, 203764), (121, 165032), (154, 129668), (196, 101882), (242, 82516), (308, 64834), (392, 50941), (421, 47432), (484, 41258), (539, 37048), (616, 32417), (842, 23716), (847, 23576), (968, 20629), (1078, 18524), (1684, 11858), (1694, 11788), (2156, 9262), (2947, 6776), (3368, 5929), (3388, 5894), (4312, 4631)]