20978136

素因数分解:

$2^3\times 3^3\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:258

約数の個数: 128

約数和(自身を含む): 64152000

約数和(自身を除く): 43173864

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 17, 18, 24, 27, 29, 34, 36, 51, 54, 58, 68, 72, 87, 102, 108, 116, 136, 153, 174, 197, 204, 216, 232, 261, 306, 348, 394, 408, 459, 493, 522, 591, 612, 696, 783, 788, 918, 986, 1044, 1182, 1224, 1479, 1566, 1576, 1773, 1836, 1972, 2088, 2364, 2958, 3132, 3349, 3546, 3672, 3944, 4437, 4728, 5319, 5713, 5916, 6264, 6698, 7092, 8874, 10047, 10638, 11426, 11832, 13311, 13396, 14184, 17139, 17748, 20094, 21276, 22852, 26622, 26792, 30141, 34278, 35496, 40188, 42552, 45704, 51417, 53244, 60282, 68556, 80376, 90423, 97121, 102834, 106488, 120564, 137112, 154251, 180846, 194242, 205668, 241128, 291363, 308502, 361692, 388484, 411336, 582726, 617004, 723384, 776968, 874089, 1165452, 1234008, 1748178, 2330904, 2622267, 3496356, 5244534, 6992712, 10489068, 20978136]

約数ペア:

[(1, 20978136), (2, 10489068), (3, 6992712), (4, 5244534), (6, 3496356), (8, 2622267), (9, 2330904), (12, 1748178), (17, 1234008), (18, 1165452), (24, 874089), (27, 776968), (29, 723384), (34, 617004), (36, 582726), (51, 411336), (54, 388484), (58, 361692), (68, 308502), (72, 291363), (87, 241128), (102, 205668), (108, 194242), (116, 180846), (136, 154251), (153, 137112), (174, 120564), (197, 106488), (204, 102834), (216, 97121), (232, 90423), (261, 80376), (306, 68556), (348, 60282), (394, 53244), (408, 51417), (459, 45704), (493, 42552), (522, 40188), (591, 35496), (612, 34278), (696, 30141), (783, 26792), (788, 26622), (918, 22852), (986, 21276), (1044, 20094), (1182, 17748), (1224, 17139), (1479, 14184), (1566, 13396), (1576, 13311), (1773, 11832), (1836, 11426), (1972, 10638), (2088, 10047), (2364, 8874), (2958, 7092), (3132, 6698), (3349, 6264), (3546, 5916), (3672, 5713), (3944, 5319), (4437, 4728)]