21395556

素因数分解:

$2^2\times 3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{311}}^1$

素因数の和:351

約数の個数: 144

約数和(自身を含む): 69713280

約数和(自身を除く): 48317724

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 13, 14, 18, 21, 26, 27, 28, 36, 39, 42, 49, 52, 54, 63, 78, 84, 91, 98, 108, 117, 126, 147, 156, 182, 189, 196, 234, 252, 273, 294, 311, 351, 364, 378, 441, 468, 546, 588, 622, 637, 702, 756, 819, 882, 933, 1092, 1244, 1274, 1323, 1404, 1638, 1764, 1866, 1911, 2177, 2457, 2548, 2646, 2799, 3276, 3732, 3822, 4043, 4354, 4914, 5292, 5598, 5733, 6531, 7644, 8086, 8397, 8708, 9828, 11196, 11466, 12129, 13062, 15239, 16172, 16794, 17199, 19593, 22932, 24258, 26124, 28301, 30478, 33588, 34398, 36387, 39186, 45717, 48516, 56602, 58779, 60956, 68796, 72774, 78372, 84903, 91434, 109161, 113204, 117558, 137151, 145548, 169806, 182868, 198107, 218322, 235116, 254709, 274302, 339612, 396214, 411453, 436644, 509418, 548604, 594321, 764127, 792428, 822906, 1018836, 1188642, 1528254, 1645812, 1782963, 2377284, 3056508, 3565926, 5348889, 7131852, 10697778, 21395556]

約数ペア:

[(1, 21395556), (2, 10697778), (3, 7131852), (4, 5348889), (6, 3565926), (7, 3056508), (9, 2377284), (12, 1782963), (13, 1645812), (14, 1528254), (18, 1188642), (21, 1018836), (26, 822906), (27, 792428), (28, 764127), (36, 594321), (39, 548604), (42, 509418), (49, 436644), (52, 411453), (54, 396214), (63, 339612), (78, 274302), (84, 254709), (91, 235116), (98, 218322), (108, 198107), (117, 182868), (126, 169806), (147, 145548), (156, 137151), (182, 117558), (189, 113204), (196, 109161), (234, 91434), (252, 84903), (273, 78372), (294, 72774), (311, 68796), (351, 60956), (364, 58779), (378, 56602), (441, 48516), (468, 45717), (546, 39186), (588, 36387), (622, 34398), (637, 33588), (702, 30478), (756, 28301), (819, 26124), (882, 24258), (933, 22932), (1092, 19593), (1244, 17199), (1274, 16794), (1323, 16172), (1404, 15239), (1638, 13062), (1764, 12129), (1866, 11466), (1911, 11196), (2177, 9828), (2457, 8708), (2548, 8397), (2646, 8086), (2799, 7644), (3276, 6531), (3732, 5733), (3822, 5598), (4043, 5292), (4354, 4914)]