21086856

素因数分解:

$2^3\times 3^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:208

約数の個数: 144

約数和(自身を含む): 68468400

約数和(自身を除く): 47381544

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 43, 49, 56, 63, 72, 84, 86, 98, 126, 129, 139, 147, 168, 172, 196, 252, 258, 278, 294, 301, 344, 387, 392, 417, 441, 504, 516, 556, 588, 602, 774, 834, 882, 903, 973, 1032, 1112, 1176, 1204, 1251, 1548, 1668, 1764, 1806, 1946, 2107, 2408, 2502, 2709, 2919, 3096, 3336, 3528, 3612, 3892, 4214, 5004, 5418, 5838, 5977, 6321, 6811, 7224, 7784, 8428, 8757, 10008, 10836, 11676, 11954, 12642, 13622, 16856, 17514, 17931, 18963, 20433, 21672, 23352, 23908, 25284, 27244, 35028, 35862, 37926, 40866, 41839, 47816, 50568, 53793, 54488, 61299, 70056, 71724, 75852, 81732, 83678, 107586, 122598, 125517, 143448, 151704, 163464, 167356, 215172, 245196, 251034, 292873, 334712, 376551, 430344, 490392, 502068, 585746, 753102, 878619, 1004136, 1171492, 1506204, 1757238, 2342984, 2635857, 3012408, 3514476, 5271714, 7028952, 10543428, 21086856]

約数ペア:

[(1, 21086856), (2, 10543428), (3, 7028952), (4, 5271714), (6, 3514476), (7, 3012408), (8, 2635857), (9, 2342984), (12, 1757238), (14, 1506204), (18, 1171492), (21, 1004136), (24, 878619), (28, 753102), (36, 585746), (42, 502068), (43, 490392), (49, 430344), (56, 376551), (63, 334712), (72, 292873), (84, 251034), (86, 245196), (98, 215172), (126, 167356), (129, 163464), (139, 151704), (147, 143448), (168, 125517), (172, 122598), (196, 107586), (252, 83678), (258, 81732), (278, 75852), (294, 71724), (301, 70056), (344, 61299), (387, 54488), (392, 53793), (417, 50568), (441, 47816), (504, 41839), (516, 40866), (556, 37926), (588, 35862), (602, 35028), (774, 27244), (834, 25284), (882, 23908), (903, 23352), (973, 21672), (1032, 20433), (1112, 18963), (1176, 17931), (1204, 17514), (1251, 16856), (1548, 13622), (1668, 12642), (1764, 11954), (1806, 11676), (1946, 10836), (2107, 10008), (2408, 8757), (2502, 8428), (2709, 7784), (2919, 7224), (3096, 6811), (3336, 6321), (3528, 5977), (3612, 5838), (3892, 5418), (4214, 5004)]