21077976780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{1987}}^1\times {\mathrm{8419}}^1$

素因数の和:10428

約数の個数: 144

約数和(自身を含む): 73115777280

約数和(自身を除く): 52037800500

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 1987, 3974, 5961, 7948, 8419, 9935, 11922, 13909, 16838, 17883, 19870, 23844, 25257, 27818, 29805, 33676, 35766, 39740, 41727, 42095, 50514, 55636, 58933, 59610, 69545, 71532, 75771, 83454, 84190, 89415, 101028, 117866, 119220, 125181, 126285, 139090, 151542, 166908, 168380, 176799, 178830, 208635, 235732, 250362, 252570, 278180, 294665, 303084, 353598, 357660, 378855, 417270, 500724, 505140, 530397, 589330, 625905, 707196, 757710, 834540, 883995, 1060794, 1178660, 1251810, 1515420, 1767990, 2121588, 2503620, 2651985, 3535980, 5303970, 10607940, 16728553, 33457106, 50185659, 66914212, 83642765, 100371318, 117099871, 150556977, 167285530, 200742636, 234199742, 250928295, 301113954, 334571060, 351299613, 468399484, 501856590, 585499355, 602227908, 702599226, 752784885, 1003713180, 1053898839, 1170998710, 1405198452, 1505569770, 1756498065, 2107797678, 2341997420, 3011139540, 3512996130, 4215595356, 5269494195, 7025992260, 10538988390, 21077976780]

約数ペア:

[(1, 21077976780), (2, 10538988390), (3, 7025992260), (4, 5269494195), (5, 4215595356), (6, 3512996130), (7, 3011139540), (9, 2341997420), (10, 2107797678), (12, 1756498065), (14, 1505569770), (15, 1405198452), (18, 1170998710), (20, 1053898839), (21, 1003713180), (28, 752784885), (30, 702599226), (35, 602227908), (36, 585499355), (42, 501856590), (45, 468399484), (60, 351299613), (63, 334571060), (70, 301113954), (84, 250928295), (90, 234199742), (105, 200742636), (126, 167285530), (140, 150556977), (180, 117099871), (210, 100371318), (252, 83642765), (315, 66914212), (420, 50185659), (630, 33457106), (1260, 16728553), (1987, 10607940), (3974, 5303970), (5961, 3535980), (7948, 2651985), (8419, 2503620), (9935, 2121588), (11922, 1767990), (13909, 1515420), (16838, 1251810), (17883, 1178660), (19870, 1060794), (23844, 883995), (25257, 834540), (27818, 757710), (29805, 707196), (33676, 625905), (35766, 589330), (39740, 530397), (41727, 505140), (42095, 500724), (50514, 417270), (55636, 378855), (58933, 357660), (59610, 353598), (69545, 303084), (71532, 294665), (75771, 278180), (83454, 252570), (84190, 250362), (89415, 235732), (101028, 208635), (117866, 178830), (119220, 176799), (125181, 168380), (126285, 166908), (139090, 151542)]