21140028

素因数分解:

$2^2\times 3^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1$

素因数の和:278

約数の個数: 144

約数和(自身を含む): 68490240

約数和(自身を除く): 47350212

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 13, 14, 18, 21, 26, 27, 28, 36, 39, 42, 52, 54, 63, 78, 81, 84, 91, 108, 117, 126, 156, 162, 182, 189, 234, 239, 243, 252, 273, 324, 351, 364, 378, 468, 478, 486, 546, 567, 702, 717, 756, 819, 956, 972, 1053, 1092, 1134, 1404, 1434, 1638, 1673, 1701, 2106, 2151, 2268, 2457, 2868, 3107, 3159, 3276, 3346, 3402, 4212, 4302, 4914, 5019, 6214, 6318, 6453, 6692, 6804, 7371, 8604, 9321, 9828, 10038, 12428, 12636, 12906, 14742, 15057, 18642, 19359, 20076, 21749, 22113, 25812, 27963, 29484, 30114, 37284, 38718, 43498, 44226, 45171, 55926, 58077, 60228, 65247, 77436, 83889, 86996, 88452, 90342, 111852, 116154, 130494, 135513, 167778, 180684, 195741, 232308, 251667, 260988, 271026, 335556, 391482, 406539, 503334, 542052, 587223, 755001, 782964, 813078, 1006668, 1174446, 1510002, 1626156, 1761669, 2348892, 3020004, 3523338, 5285007, 7046676, 10570014, 21140028]

約数ペア:

[(1, 21140028), (2, 10570014), (3, 7046676), (4, 5285007), (6, 3523338), (7, 3020004), (9, 2348892), (12, 1761669), (13, 1626156), (14, 1510002), (18, 1174446), (21, 1006668), (26, 813078), (27, 782964), (28, 755001), (36, 587223), (39, 542052), (42, 503334), (52, 406539), (54, 391482), (63, 335556), (78, 271026), (81, 260988), (84, 251667), (91, 232308), (108, 195741), (117, 180684), (126, 167778), (156, 135513), (162, 130494), (182, 116154), (189, 111852), (234, 90342), (239, 88452), (243, 86996), (252, 83889), (273, 77436), (324, 65247), (351, 60228), (364, 58077), (378, 55926), (468, 45171), (478, 44226), (486, 43498), (546, 38718), (567, 37284), (702, 30114), (717, 29484), (756, 27963), (819, 25812), (956, 22113), (972, 21749), (1053, 20076), (1092, 19359), (1134, 18642), (1404, 15057), (1434, 14742), (1638, 12906), (1673, 12636), (1701, 12428), (2106, 10038), (2151, 9828), (2268, 9321), (2457, 8604), (2868, 7371), (3107, 6804), (3159, 6692), (3276, 6453), (3346, 6318), (3402, 6214), (4212, 5019), (4302, 4914)]