28778211

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{317}}^1$

素因数の和:472

約数の個数: 48

約数和(自身を含む): 52386048

約数和(自身を除く): 23607837

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 131, 231, 317, 393, 693, 917, 951, 1179, 1441, 2219, 2751, 2853, 3487, 4323, 6657, 8253, 10087, 10461, 12969, 19971, 24409, 30261, 31383, 41527, 73227, 90783, 124581, 219681, 290689, 373743, 456797, 872067, 1370391, 2616201, 3197579, 4111173, 9592737, 28778211]

約数ペア:

[(1, 28778211), (3, 9592737), (7, 4111173), (9, 3197579), (11, 2616201), (21, 1370391), (33, 872067), (63, 456797), (77, 373743), (99, 290689), (131, 219681), (231, 124581), (317, 90783), (393, 73227), (693, 41527), (917, 31383), (951, 30261), (1179, 24409), (1441, 19971), (2219, 12969), (2751, 10461), (2853, 10087), (3487, 8253), (4323, 6657)]