261806168

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{2819}}^1$

素因数の和:2904

約数の個数: 64

約数和(自身を含む): 568512000

約数和(自身を除く): 306705832

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 47, 52, 76, 94, 104, 152, 188, 247, 376, 494, 611, 893, 988, 1222, 1786, 1976, 2444, 2819, 3572, 4888, 5638, 7144, 11276, 11609, 22552, 23218, 36647, 46436, 53561, 73294, 92872, 107122, 132493, 146588, 214244, 264986, 293176, 428488, 529972, 696293, 1059944, 1392586, 1722409, 2517367, 2785172, 3444818, 5034734, 5570344, 6889636, 10069468, 13779272, 20138936, 32725771, 65451542, 130903084, 261806168]

約数ペア:

[(1, 261806168), (2, 130903084), (4, 65451542), (8, 32725771), (13, 20138936), (19, 13779272), (26, 10069468), (38, 6889636), (47, 5570344), (52, 5034734), (76, 3444818), (94, 2785172), (104, 2517367), (152, 1722409), (188, 1392586), (247, 1059944), (376, 696293), (494, 529972), (611, 428488), (893, 293176), (988, 264986), (1222, 214244), (1786, 146588), (1976, 132493), (2444, 107122), (2819, 92872), (3572, 73294), (4888, 53561), (5638, 46436), (7144, 36647), (11276, 23218), (11609, 22552)]