21227220

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{991}}^1$

素因数の和:1030

約数の個数: 144

約数和(自身を含む): 77995008

約数和(自身を除く): 56767788

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 17, 18, 20, 21, 28, 30, 34, 35, 36, 42, 45, 51, 60, 63, 68, 70, 84, 85, 90, 102, 105, 119, 126, 140, 153, 170, 180, 204, 210, 238, 252, 255, 306, 315, 340, 357, 420, 476, 510, 595, 612, 630, 714, 765, 991, 1020, 1071, 1190, 1260, 1428, 1530, 1785, 1982, 2142, 2380, 2973, 3060, 3570, 3964, 4284, 4955, 5355, 5946, 6937, 7140, 8919, 9910, 10710, 11892, 13874, 14865, 16847, 17838, 19820, 20811, 21420, 27748, 29730, 33694, 34685, 35676, 41622, 44595, 50541, 59460, 62433, 67388, 69370, 83244, 84235, 89190, 101082, 104055, 117929, 124866, 138740, 151623, 168470, 178380, 202164, 208110, 235858, 249732, 252705, 303246, 312165, 336940, 353787, 416220, 471716, 505410, 589645, 606492, 624330, 707574, 758115, 1010820, 1061361, 1179290, 1248660, 1415148, 1516230, 1768935, 2122722, 2358580, 3032460, 3537870, 4245444, 5306805, 7075740, 10613610, 21227220]

約数ペア:

[(1, 21227220), (2, 10613610), (3, 7075740), (4, 5306805), (5, 4245444), (6, 3537870), (7, 3032460), (9, 2358580), (10, 2122722), (12, 1768935), (14, 1516230), (15, 1415148), (17, 1248660), (18, 1179290), (20, 1061361), (21, 1010820), (28, 758115), (30, 707574), (34, 624330), (35, 606492), (36, 589645), (42, 505410), (45, 471716), (51, 416220), (60, 353787), (63, 336940), (68, 312165), (70, 303246), (84, 252705), (85, 249732), (90, 235858), (102, 208110), (105, 202164), (119, 178380), (126, 168470), (140, 151623), (153, 138740), (170, 124866), (180, 117929), (204, 104055), (210, 101082), (238, 89190), (252, 84235), (255, 83244), (306, 69370), (315, 67388), (340, 62433), (357, 59460), (420, 50541), (476, 44595), (510, 41622), (595, 35676), (612, 34685), (630, 33694), (714, 29730), (765, 27748), (991, 21420), (1020, 20811), (1071, 19820), (1190, 17838), (1260, 16847), (1428, 14865), (1530, 13874), (1785, 11892), (1982, 10710), (2142, 9910), (2380, 8919), (2973, 7140), (3060, 6937), (3570, 5946), (3964, 5355), (4284, 4955)]