21381456800

素因数分解:

$2^5\times 5^2\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{12721}}^1$

素因数の和:12943

約数の個数: 144

約数和(自身を含む): 57245336064

約数和(自身を除く): 35863879264

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 44, 50, 55, 80, 88, 100, 110, 160, 176, 191, 200, 220, 275, 352, 382, 400, 440, 550, 764, 800, 880, 955, 1100, 1528, 1760, 1910, 2101, 2200, 3056, 3820, 4202, 4400, 4775, 6112, 7640, 8404, 8800, 9550, 10505, 12721, 15280, 16808, 19100, 21010, 25442, 30560, 33616, 38200, 42020, 50884, 52525, 63605, 67232, 76400, 84040, 101768, 105050, 127210, 139931, 152800, 168080, 203536, 210100, 254420, 279862, 318025, 336160, 407072, 420200, 508840, 559724, 636050, 699655, 840400, 1017680, 1119448, 1272100, 1399310, 1680800, 2035360, 2238896, 2429711, 2544200, 2798620, 3498275, 4477792, 4859422, 5088400, 5597240, 6996550, 9718844, 10176800, 11194480, 12148555, 13993100, 19437688, 22388960, 24297110, 26726821, 27986200, 38875376, 48594220, 53453642, 55972400, 60742775, 77750752, 97188440, 106907284, 111944800, 121485550, 133634105, 194376880, 213814568, 242971100, 267268210, 388753760, 427629136, 485942200, 534536420, 668170525, 855258272, 971884400, 1069072840, 1336341050, 1943768800, 2138145680, 2672682100, 4276291360, 5345364200, 10690728400, 21381456800]

約数ペア:

[(1, 21381456800), (2, 10690728400), (4, 5345364200), (5, 4276291360), (8, 2672682100), (10, 2138145680), (11, 1943768800), (16, 1336341050), (20, 1069072840), (22, 971884400), (25, 855258272), (32, 668170525), (40, 534536420), (44, 485942200), (50, 427629136), (55, 388753760), (80, 267268210), (88, 242971100), (100, 213814568), (110, 194376880), (160, 133634105), (176, 121485550), (191, 111944800), (200, 106907284), (220, 97188440), (275, 77750752), (352, 60742775), (382, 55972400), (400, 53453642), (440, 48594220), (550, 38875376), (764, 27986200), (800, 26726821), (880, 24297110), (955, 22388960), (1100, 19437688), (1528, 13993100), (1760, 12148555), (1910, 11194480), (2101, 10176800), (2200, 9718844), (3056, 6996550), (3820, 5597240), (4202, 5088400), (4400, 4859422), (4775, 4477792), (6112, 3498275), (7640, 2798620), (8404, 2544200), (8800, 2429711), (9550, 2238896), (10505, 2035360), (12721, 1680800), (15280, 1399310), (16808, 1272100), (19100, 1119448), (21010, 1017680), (25442, 840400), (30560, 699655), (33616, 636050), (38200, 559724), (42020, 508840), (50884, 420200), (52525, 407072), (63605, 336160), (67232, 318025), (76400, 279862), (84040, 254420), (101768, 210100), (105050, 203536), (127210, 168080), (139931, 152800)]