21256704

素因数分解:

$2^9\times 3^2\times 7^1\times {\mathrm{659}}^1$

素因数の和:690

約数の個数: 120

約数和(自身を含む): 70218720

約数和(自身を除く): 48962016

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 48, 56, 63, 64, 72, 84, 96, 112, 126, 128, 144, 168, 192, 224, 252, 256, 288, 336, 384, 448, 504, 512, 576, 659, 672, 768, 896, 1008, 1152, 1318, 1344, 1536, 1792, 1977, 2016, 2304, 2636, 2688, 3584, 3954, 4032, 4608, 4613, 5272, 5376, 5931, 7908, 8064, 9226, 10544, 10752, 11862, 13839, 15816, 16128, 18452, 21088, 23724, 27678, 31632, 32256, 36904, 41517, 42176, 47448, 55356, 63264, 73808, 83034, 84352, 94896, 110712, 126528, 147616, 166068, 168704, 189792, 221424, 253056, 295232, 332136, 337408, 379584, 442848, 506112, 590464, 664272, 759168, 885696, 1012224, 1180928, 1328544, 1518336, 1771392, 2361856, 2657088, 3036672, 3542784, 5314176, 7085568, 10628352, 21256704]

約数ペア:

[(1, 21256704), (2, 10628352), (3, 7085568), (4, 5314176), (6, 3542784), (7, 3036672), (8, 2657088), (9, 2361856), (12, 1771392), (14, 1518336), (16, 1328544), (18, 1180928), (21, 1012224), (24, 885696), (28, 759168), (32, 664272), (36, 590464), (42, 506112), (48, 442848), (56, 379584), (63, 337408), (64, 332136), (72, 295232), (84, 253056), (96, 221424), (112, 189792), (126, 168704), (128, 166068), (144, 147616), (168, 126528), (192, 110712), (224, 94896), (252, 84352), (256, 83034), (288, 73808), (336, 63264), (384, 55356), (448, 47448), (504, 42176), (512, 41517), (576, 36904), (659, 32256), (672, 31632), (768, 27678), (896, 23724), (1008, 21088), (1152, 18452), (1318, 16128), (1344, 15816), (1536, 13839), (1792, 11862), (1977, 10752), (2016, 10544), (2304, 9226), (2636, 8064), (2688, 7908), (3584, 5931), (3954, 5376), (4032, 5272), (4608, 4613)]