21980322

素因数分解:

$2^1\times 3^5\times 7^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:115

約数の個数: 144

約数和(自身を含む): 62741952

約数和(自身を除く): 40761630

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 27, 39, 42, 49, 54, 63, 71, 78, 81, 91, 98, 117, 126, 142, 147, 162, 182, 189, 213, 234, 243, 273, 294, 351, 378, 426, 441, 486, 497, 546, 567, 637, 639, 702, 819, 882, 923, 994, 1053, 1134, 1274, 1278, 1323, 1491, 1638, 1701, 1846, 1911, 1917, 2106, 2457, 2646, 2769, 2982, 3159, 3402, 3479, 3822, 3834, 3969, 4473, 4914, 5538, 5733, 5751, 6318, 6461, 6958, 7371, 7938, 8307, 8946, 10437, 11466, 11502, 11907, 12922, 13419, 14742, 16614, 17199, 17253, 19383, 20874, 22113, 23814, 24921, 26838, 31311, 34398, 34506, 38766, 40257, 44226, 45227, 49842, 51597, 58149, 62622, 74763, 80514, 90454, 93933, 103194, 116298, 120771, 135681, 149526, 154791, 174447, 187866, 224289, 241542, 271362, 281799, 309582, 348894, 407043, 448578, 523341, 563598, 814086, 845397, 1046682, 1221129, 1570023, 1690794, 2442258, 3140046, 3663387, 7326774, 10990161, 21980322]

約数ペア:

[(1, 21980322), (2, 10990161), (3, 7326774), (6, 3663387), (7, 3140046), (9, 2442258), (13, 1690794), (14, 1570023), (18, 1221129), (21, 1046682), (26, 845397), (27, 814086), (39, 563598), (42, 523341), (49, 448578), (54, 407043), (63, 348894), (71, 309582), (78, 281799), (81, 271362), (91, 241542), (98, 224289), (117, 187866), (126, 174447), (142, 154791), (147, 149526), (162, 135681), (182, 120771), (189, 116298), (213, 103194), (234, 93933), (243, 90454), (273, 80514), (294, 74763), (351, 62622), (378, 58149), (426, 51597), (441, 49842), (486, 45227), (497, 44226), (546, 40257), (567, 38766), (637, 34506), (639, 34398), (702, 31311), (819, 26838), (882, 24921), (923, 23814), (994, 22113), (1053, 20874), (1134, 19383), (1274, 17253), (1278, 17199), (1323, 16614), (1491, 14742), (1638, 13419), (1701, 12922), (1846, 11907), (1911, 11502), (1917, 11466), (2106, 10437), (2457, 8946), (2646, 8307), (2769, 7938), (2982, 7371), (3159, 6958), (3402, 6461), (3479, 6318), (3822, 5751), (3834, 5733), (3969, 5538), (4473, 4914)]