20120668420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{127}}^1\times {\mathrm{8243}}^1$

素因数の和:8441

約数の個数: 72

約数和(自身を含む): 44009505792

約数和(自身を除く): 23888837372

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 254, 310, 508, 620, 635, 961, 1270, 1922, 2540, 3844, 3937, 4805, 7874, 8243, 9610, 15748, 16486, 19220, 19685, 32972, 39370, 41215, 78740, 82430, 122047, 164860, 244094, 255533, 488188, 511066, 610235, 1022132, 1046861, 1220470, 1277665, 2093722, 2440940, 2555330, 4187444, 5110660, 5234305, 7921523, 10468610, 15843046, 20937220, 31686092, 32452691, 39607615, 64905382, 79215230, 129810764, 158430460, 162263455, 324526910, 649053820, 1006033421, 2012066842, 4024133684, 5030167105, 10060334210, 20120668420]

約数ペア:

[(1, 20120668420), (2, 10060334210), (4, 5030167105), (5, 4024133684), (10, 2012066842), (20, 1006033421), (31, 649053820), (62, 324526910), (124, 162263455), (127, 158430460), (155, 129810764), (254, 79215230), (310, 64905382), (508, 39607615), (620, 32452691), (635, 31686092), (961, 20937220), (1270, 15843046), (1922, 10468610), (2540, 7921523), (3844, 5234305), (3937, 5110660), (4805, 4187444), (7874, 2555330), (8243, 2440940), (9610, 2093722), (15748, 1277665), (16486, 1220470), (19220, 1046861), (19685, 1022132), (32972, 610235), (39370, 511066), (41215, 488188), (78740, 255533), (82430, 244094), (122047, 164860)]