21257964

素因数分解:

$2^2\times 3^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1$

素因数の和:146

約数の個数: 180

約数和(自身を含む): 70294224

約数和(自身を除く): 49036260

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, 81, 84, 91, 98, 103, 108, 117, 126, 147, 156, 162, 182, 189, 196, 206, 234, 252, 273, 294, 309, 324, 351, 364, 378, 412, 441, 468, 546, 567, 588, 618, 637, 702, 721, 756, 819, 882, 927, 1053, 1092, 1134, 1236, 1274, 1323, 1339, 1404, 1442, 1638, 1764, 1854, 1911, 2106, 2163, 2268, 2457, 2548, 2646, 2678, 2781, 2884, 3276, 3708, 3822, 3969, 4017, 4212, 4326, 4914, 5047, 5292, 5356, 5562, 5733, 6489, 7371, 7644, 7938, 8034, 8343, 8652, 9373, 9828, 10094, 11124, 11466, 12051, 12978, 14742, 15141, 15876, 16068, 16686, 17199, 18746, 19467, 20188, 22932, 24102, 25956, 28119, 29484, 30282, 33372, 34398, 36153, 37492, 38934, 45423, 48204, 51597, 56238, 58401, 60564, 65611, 68796, 72306, 77868, 84357, 90846, 103194, 108459, 112476, 116802, 131222, 136269, 144612, 168714, 181692, 196833, 206388, 216918, 233604, 253071, 262444, 272538, 337428, 393666, 408807, 433836, 506142, 545076, 590499, 759213, 787332, 817614, 1012284, 1180998, 1518426, 1635228, 1771497, 2361996, 3036852, 3542994, 5314491, 7085988, 10628982, 21257964]

約数ペア:

[(1, 21257964), (2, 10628982), (3, 7085988), (4, 5314491), (6, 3542994), (7, 3036852), (9, 2361996), (12, 1771497), (13, 1635228), (14, 1518426), (18, 1180998), (21, 1012284), (26, 817614), (27, 787332), (28, 759213), (36, 590499), (39, 545076), (42, 506142), (49, 433836), (52, 408807), (54, 393666), (63, 337428), (78, 272538), (81, 262444), (84, 253071), (91, 233604), (98, 216918), (103, 206388), (108, 196833), (117, 181692), (126, 168714), (147, 144612), (156, 136269), (162, 131222), (182, 116802), (189, 112476), (196, 108459), (206, 103194), (234, 90846), (252, 84357), (273, 77868), (294, 72306), (309, 68796), (324, 65611), (351, 60564), (364, 58401), (378, 56238), (412, 51597), (441, 48204), (468, 45423), (546, 38934), (567, 37492), (588, 36153), (618, 34398), (637, 33372), (702, 30282), (721, 29484), (756, 28119), (819, 25956), (882, 24102), (927, 22932), (1053, 20188), (1092, 19467), (1134, 18746), (1236, 17199), (1274, 16686), (1323, 16068), (1339, 15876), (1404, 15141), (1442, 14742), (1638, 12978), (1764, 12051), (1854, 11466), (1911, 11124), (2106, 10094), (2163, 9828), (2268, 9373), (2457, 8652), (2548, 8343), (2646, 8034), (2678, 7938), (2781, 7644), (2884, 7371), (3276, 6489), (3708, 5733), (3822, 5562), (3969, 5356), (4017, 5292), (4212, 5047), (4326, 4914)]