21909090

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^2$

素因数の和:89

約数の個数: 144

約数和(自身を含む): 67372992

約数和(自身を除く): 45463902

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 17, 19, 21, 30, 34, 35, 38, 42, 51, 57, 70, 85, 95, 102, 105, 114, 119, 133, 170, 190, 210, 238, 255, 266, 285, 289, 323, 357, 361, 399, 510, 570, 578, 595, 646, 665, 714, 722, 798, 867, 969, 1083, 1190, 1330, 1445, 1615, 1734, 1785, 1805, 1938, 1995, 2023, 2166, 2261, 2527, 2890, 3230, 3570, 3610, 3990, 4046, 4335, 4522, 4845, 5054, 5415, 5491, 6069, 6137, 6783, 7581, 8670, 9690, 10115, 10830, 10982, 11305, 12138, 12274, 12635, 13566, 15162, 16473, 18411, 20230, 22610, 25270, 27455, 30345, 30685, 32946, 33915, 36822, 37905, 38437, 42959, 54910, 60690, 61370, 67830, 75810, 76874, 82365, 85918, 92055, 104329, 115311, 128877, 164730, 184110, 192185, 208658, 214795, 230622, 257754, 312987, 384370, 429590, 521645, 576555, 625974, 644385, 730303, 1043290, 1153110, 1288770, 1460606, 1564935, 2190909, 3129870, 3651515, 4381818, 7303030, 10954545, 21909090]

約数ペア:

[(1, 21909090), (2, 10954545), (3, 7303030), (5, 4381818), (6, 3651515), (7, 3129870), (10, 2190909), (14, 1564935), (15, 1460606), (17, 1288770), (19, 1153110), (21, 1043290), (30, 730303), (34, 644385), (35, 625974), (38, 576555), (42, 521645), (51, 429590), (57, 384370), (70, 312987), (85, 257754), (95, 230622), (102, 214795), (105, 208658), (114, 192185), (119, 184110), (133, 164730), (170, 128877), (190, 115311), (210, 104329), (238, 92055), (255, 85918), (266, 82365), (285, 76874), (289, 75810), (323, 67830), (357, 61370), (361, 60690), (399, 54910), (510, 42959), (570, 38437), (578, 37905), (595, 36822), (646, 33915), (665, 32946), (714, 30685), (722, 30345), (798, 27455), (867, 25270), (969, 22610), (1083, 20230), (1190, 18411), (1330, 16473), (1445, 15162), (1615, 13566), (1734, 12635), (1785, 12274), (1805, 12138), (1938, 11305), (1995, 10982), (2023, 10830), (2166, 10115), (2261, 9690), (2527, 8670), (2890, 7581), (3230, 6783), (3570, 6137), (3610, 6069), (3990, 5491), (4046, 5415), (4335, 5054), (4522, 4845)]