21516768

素因数分解:

$2^5\times 3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{821}}^1$

素因数の和:857

約数の個数: 144

約数和(自身を含む): 75400416

約数和(自身を除く): 53883648

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 13, 14, 16, 18, 21, 24, 26, 28, 32, 36, 39, 42, 48, 52, 56, 63, 72, 78, 84, 91, 96, 104, 112, 117, 126, 144, 156, 168, 182, 208, 224, 234, 252, 273, 288, 312, 336, 364, 416, 468, 504, 546, 624, 672, 728, 819, 821, 936, 1008, 1092, 1248, 1456, 1638, 1642, 1872, 2016, 2184, 2463, 2912, 3276, 3284, 3744, 4368, 4926, 5747, 6552, 6568, 7389, 8736, 9852, 10673, 11494, 13104, 13136, 14778, 17241, 19704, 21346, 22988, 26208, 26272, 29556, 32019, 34482, 39408, 42692, 45976, 51723, 59112, 64038, 68964, 74711, 78816, 85384, 91952, 96057, 103446, 118224, 128076, 137928, 149422, 170768, 183904, 192114, 206892, 224133, 236448, 256152, 275856, 298844, 341536, 384228, 413784, 448266, 512304, 551712, 597688, 672399, 768456, 827568, 896532, 1024608, 1195376, 1344798, 1536912, 1655136, 1793064, 2390752, 2689596, 3073824, 3586128, 5379192, 7172256, 10758384, 21516768]

約数ペア:

[(1, 21516768), (2, 10758384), (3, 7172256), (4, 5379192), (6, 3586128), (7, 3073824), (8, 2689596), (9, 2390752), (12, 1793064), (13, 1655136), (14, 1536912), (16, 1344798), (18, 1195376), (21, 1024608), (24, 896532), (26, 827568), (28, 768456), (32, 672399), (36, 597688), (39, 551712), (42, 512304), (48, 448266), (52, 413784), (56, 384228), (63, 341536), (72, 298844), (78, 275856), (84, 256152), (91, 236448), (96, 224133), (104, 206892), (112, 192114), (117, 183904), (126, 170768), (144, 149422), (156, 137928), (168, 128076), (182, 118224), (208, 103446), (224, 96057), (234, 91952), (252, 85384), (273, 78816), (288, 74711), (312, 68964), (336, 64038), (364, 59112), (416, 51723), (468, 45976), (504, 42692), (546, 39408), (624, 34482), (672, 32019), (728, 29556), (819, 26272), (821, 26208), (936, 22988), (1008, 21346), (1092, 19704), (1248, 17241), (1456, 14778), (1638, 13136), (1642, 13104), (1872, 11494), (2016, 10673), (2184, 9852), (2463, 8736), (2912, 7389), (3276, 6568), (3284, 6552), (3744, 5747), (4368, 4926)]