21256620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:180

約数の個数: 192

約数和(自身を含む): 76640256

約数和(自身を除く): 55383636

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 43, 44, 55, 60, 66, 70, 77, 84, 86, 105, 107, 110, 129, 132, 140, 154, 165, 172, 210, 214, 215, 220, 231, 258, 301, 308, 321, 330, 385, 420, 428, 430, 462, 473, 516, 535, 602, 642, 645, 660, 749, 770, 860, 903, 924, 946, 1070, 1155, 1177, 1204, 1284, 1290, 1419, 1498, 1505, 1540, 1605, 1806, 1892, 2140, 2247, 2310, 2354, 2365, 2580, 2838, 2996, 3010, 3210, 3311, 3531, 3612, 3745, 4494, 4515, 4601, 4620, 4708, 4730, 5676, 5885, 6020, 6420, 6622, 7062, 7095, 7490, 8239, 8988, 9030, 9202, 9460, 9933, 11235, 11770, 13244, 13803, 14124, 14190, 14980, 16478, 16555, 17655, 18060, 18404, 19866, 22470, 23005, 23540, 24717, 27606, 28380, 32207, 32956, 33110, 35310, 39732, 41195, 44940, 46010, 49434, 49665, 50611, 55212, 64414, 66220, 69015, 70620, 82390, 92020, 96621, 98868, 99330, 101222, 123585, 128828, 138030, 151833, 161035, 164780, 193242, 198660, 202444, 247170, 253055, 276060, 303666, 322070, 354277, 386484, 483105, 494340, 506110, 607332, 644140, 708554, 759165, 966210, 1012220, 1062831, 1417108, 1518330, 1771385, 1932420, 2125662, 3036660, 3542770, 4251324, 5314155, 7085540, 10628310, 21256620]

約数ペア:

[(1, 21256620), (2, 10628310), (3, 7085540), (4, 5314155), (5, 4251324), (6, 3542770), (7, 3036660), (10, 2125662), (11, 1932420), (12, 1771385), (14, 1518330), (15, 1417108), (20, 1062831), (21, 1012220), (22, 966210), (28, 759165), (30, 708554), (33, 644140), (35, 607332), (42, 506110), (43, 494340), (44, 483105), (55, 386484), (60, 354277), (66, 322070), (70, 303666), (77, 276060), (84, 253055), (86, 247170), (105, 202444), (107, 198660), (110, 193242), (129, 164780), (132, 161035), (140, 151833), (154, 138030), (165, 128828), (172, 123585), (210, 101222), (214, 99330), (215, 98868), (220, 96621), (231, 92020), (258, 82390), (301, 70620), (308, 69015), (321, 66220), (330, 64414), (385, 55212), (420, 50611), (428, 49665), (430, 49434), (462, 46010), (473, 44940), (516, 41195), (535, 39732), (602, 35310), (642, 33110), (645, 32956), (660, 32207), (749, 28380), (770, 27606), (860, 24717), (903, 23540), (924, 23005), (946, 22470), (1070, 19866), (1155, 18404), (1177, 18060), (1204, 17655), (1284, 16555), (1290, 16478), (1419, 14980), (1498, 14190), (1505, 14124), (1540, 13803), (1605, 13244), (1806, 11770), (1892, 11235), (2140, 9933), (2247, 9460), (2310, 9202), (2354, 9030), (2365, 8988), (2580, 8239), (2838, 7490), (2996, 7095), (3010, 7062), (3210, 6622), (3311, 6420), (3531, 6020), (3612, 5885), (3745, 5676), (4494, 4730), (4515, 4708), (4601, 4620)]