21281624

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:121

約数の個数: 128

約数和(自身を含む): 54190080

約数和(自身を除く): 32908456

約数列:

[1, 2, 4, 7, 8, 13, 14, 23, 26, 28, 31, 41, 46, 52, 56, 62, 82, 91, 92, 104, 124, 161, 164, 182, 184, 217, 248, 287, 299, 322, 328, 364, 403, 434, 533, 574, 598, 644, 713, 728, 806, 868, 943, 1066, 1148, 1196, 1271, 1288, 1426, 1612, 1736, 1886, 2093, 2132, 2296, 2392, 2542, 2821, 2852, 3224, 3731, 3772, 4186, 4264, 4991, 5084, 5642, 5704, 6601, 7462, 7544, 8372, 8897, 9269, 9982, 10168, 11284, 12259, 13202, 14924, 16523, 16744, 17794, 18538, 19964, 22568, 24518, 26404, 29233, 29848, 33046, 35588, 37076, 39928, 49036, 52808, 58466, 64883, 66092, 71176, 74152, 85813, 98072, 115661, 116932, 129766, 132184, 171626, 204631, 231322, 233864, 259532, 343252, 380029, 409262, 462644, 519064, 686504, 760058, 818524, 925288, 1520116, 1637048, 2660203, 3040232, 5320406, 10640812, 21281624]

約数ペア:

[(1, 21281624), (2, 10640812), (4, 5320406), (7, 3040232), (8, 2660203), (13, 1637048), (14, 1520116), (23, 925288), (26, 818524), (28, 760058), (31, 686504), (41, 519064), (46, 462644), (52, 409262), (56, 380029), (62, 343252), (82, 259532), (91, 233864), (92, 231322), (104, 204631), (124, 171626), (161, 132184), (164, 129766), (182, 116932), (184, 115661), (217, 98072), (248, 85813), (287, 74152), (299, 71176), (322, 66092), (328, 64883), (364, 58466), (403, 52808), (434, 49036), (533, 39928), (574, 37076), (598, 35588), (644, 33046), (713, 29848), (728, 29233), (806, 26404), (868, 24518), (943, 22568), (1066, 19964), (1148, 18538), (1196, 17794), (1271, 16744), (1288, 16523), (1426, 14924), (1612, 13202), (1736, 12259), (1886, 11284), (2093, 10168), (2132, 9982), (2296, 9269), (2392, 8897), (2542, 8372), (2821, 7544), (2852, 7462), (3224, 6601), (3731, 5704), (3772, 5642), (4186, 5084), (4264, 4991)]