21389472

素因数分解:

$2^5\times 3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:255

約数の個数: 144

約数和(自身を含む): 68108040

約数和(自身を除く): 46718568

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 29, 32, 36, 39, 48, 52, 58, 72, 78, 87, 96, 104, 116, 117, 144, 156, 174, 197, 208, 232, 234, 261, 288, 312, 348, 377, 394, 416, 464, 468, 522, 591, 624, 696, 754, 788, 928, 936, 1044, 1131, 1182, 1248, 1392, 1508, 1576, 1773, 1872, 2088, 2262, 2364, 2561, 2784, 3016, 3152, 3393, 3546, 3744, 4176, 4524, 4728, 5122, 5713, 6032, 6304, 6786, 7092, 7683, 8352, 9048, 9456, 10244, 11426, 12064, 13572, 14184, 15366, 17139, 18096, 18912, 20488, 22852, 23049, 27144, 28368, 30732, 34278, 36192, 40976, 45704, 46098, 51417, 54288, 56736, 61464, 68556, 74269, 81952, 91408, 92196, 102834, 108576, 122928, 137112, 148538, 182816, 184392, 205668, 222807, 245856, 274224, 297076, 368784, 411336, 445614, 548448, 594152, 668421, 737568, 822672, 891228, 1188304, 1336842, 1645344, 1782456, 2376608, 2673684, 3564912, 5347368, 7129824, 10694736, 21389472]

約数ペア:

[(1, 21389472), (2, 10694736), (3, 7129824), (4, 5347368), (6, 3564912), (8, 2673684), (9, 2376608), (12, 1782456), (13, 1645344), (16, 1336842), (18, 1188304), (24, 891228), (26, 822672), (29, 737568), (32, 668421), (36, 594152), (39, 548448), (48, 445614), (52, 411336), (58, 368784), (72, 297076), (78, 274224), (87, 245856), (96, 222807), (104, 205668), (116, 184392), (117, 182816), (144, 148538), (156, 137112), (174, 122928), (197, 108576), (208, 102834), (232, 92196), (234, 91408), (261, 81952), (288, 74269), (312, 68556), (348, 61464), (377, 56736), (394, 54288), (416, 51417), (464, 46098), (468, 45704), (522, 40976), (591, 36192), (624, 34278), (696, 30732), (754, 28368), (788, 27144), (928, 23049), (936, 22852), (1044, 20488), (1131, 18912), (1182, 18096), (1248, 17139), (1392, 15366), (1508, 14184), (1576, 13572), (1773, 12064), (1872, 11426), (2088, 10244), (2262, 9456), (2364, 9048), (2561, 8352), (2784, 7683), (3016, 7092), (3152, 6786), (3393, 6304), (3546, 6032), (3744, 5713), (4176, 5122), (4524, 4728)]