21002828

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1$

素因数の和:175

約数の個数: 96

約数和(自身を含む): 50050560

約数和(自身を除く): 29047732

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 37, 38, 44, 74, 76, 77, 97, 133, 148, 154, 194, 209, 259, 266, 308, 388, 407, 418, 518, 532, 679, 703, 814, 836, 1036, 1067, 1358, 1406, 1463, 1628, 1843, 2134, 2716, 2812, 2849, 2926, 3589, 3686, 4268, 4921, 5698, 5852, 7178, 7372, 7469, 7733, 9842, 11396, 12901, 14356, 14938, 15466, 19684, 20273, 25123, 25802, 29876, 30932, 39479, 40546, 50246, 51604, 54131, 68191, 78958, 81092, 100492, 108262, 136382, 141911, 157916, 216524, 272764, 276353, 283822, 477337, 552706, 567644, 750101, 954674, 1105412, 1500202, 1909348, 3000404, 5250707, 10501414, 21002828]

約数ペア:

[(1, 21002828), (2, 10501414), (4, 5250707), (7, 3000404), (11, 1909348), (14, 1500202), (19, 1105412), (22, 954674), (28, 750101), (37, 567644), (38, 552706), (44, 477337), (74, 283822), (76, 276353), (77, 272764), (97, 216524), (133, 157916), (148, 141911), (154, 136382), (194, 108262), (209, 100492), (259, 81092), (266, 78958), (308, 68191), (388, 54131), (407, 51604), (418, 50246), (518, 40546), (532, 39479), (679, 30932), (703, 29876), (814, 25802), (836, 25123), (1036, 20273), (1067, 19684), (1358, 15466), (1406, 14938), (1463, 14356), (1628, 12901), (1843, 11396), (2134, 9842), (2716, 7733), (2812, 7469), (2849, 7372), (2926, 7178), (3589, 5852), (3686, 5698), (4268, 4921)]