21207984

素因数分解:

$2^4\times 3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:223

約数の個数: 120

約数和(自身を含む): 65138688

約数和(自身を除く): 43930704

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 42, 48, 49, 56, 71, 84, 98, 112, 127, 142, 147, 168, 196, 213, 254, 284, 294, 336, 381, 392, 426, 497, 508, 568, 588, 762, 784, 852, 889, 994, 1016, 1136, 1176, 1491, 1524, 1704, 1778, 1988, 2032, 2352, 2667, 2982, 3048, 3408, 3479, 3556, 3976, 5334, 5964, 6096, 6223, 6958, 7112, 7952, 9017, 10437, 10668, 11928, 12446, 13916, 14224, 18034, 18669, 20874, 21336, 23856, 24892, 27051, 27832, 36068, 37338, 41748, 42672, 49784, 54102, 55664, 63119, 72136, 74676, 83496, 99568, 108204, 126238, 144272, 149352, 166992, 189357, 216408, 252476, 298704, 378714, 432816, 441833, 504952, 757428, 883666, 1009904, 1325499, 1514856, 1767332, 2650998, 3029712, 3534664, 5301996, 7069328, 10603992, 21207984]

約数ペア:

[(1, 21207984), (2, 10603992), (3, 7069328), (4, 5301996), (6, 3534664), (7, 3029712), (8, 2650998), (12, 1767332), (14, 1514856), (16, 1325499), (21, 1009904), (24, 883666), (28, 757428), (42, 504952), (48, 441833), (49, 432816), (56, 378714), (71, 298704), (84, 252476), (98, 216408), (112, 189357), (127, 166992), (142, 149352), (147, 144272), (168, 126238), (196, 108204), (213, 99568), (254, 83496), (284, 74676), (294, 72136), (336, 63119), (381, 55664), (392, 54102), (426, 49784), (497, 42672), (508, 41748), (568, 37338), (588, 36068), (762, 27832), (784, 27051), (852, 24892), (889, 23856), (994, 21336), (1016, 20874), (1136, 18669), (1176, 18034), (1491, 14224), (1524, 13916), (1704, 12446), (1778, 11928), (1988, 10668), (2032, 10437), (2352, 9017), (2667, 7952), (2982, 7112), (3048, 6958), (3408, 6223), (3479, 6096), (3556, 5964), (3976, 5334)]