20921855678440

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2029}}^1\times {\mathrm{3630779}}^1$

素因数の和:3632890

約数の個数: 64

約数和(自身を含む): 47760732432000

約数和(自身を除く): 26838876753560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2029, 2840, 4058, 8116, 10145, 16232, 20290, 40580, 81160, 144059, 288118, 576236, 720295, 1152472, 1440590, 2881180, 3630779, 5762360, 7261558, 14523116, 18153895, 29046232, 36307790, 72615580, 145231160, 257785309, 515570618, 1031141236, 1288926545, 2062282472, 2577853090, 5155706180, 7366850591, 10311412360, 14733701182, 29467402364, 36834252955, 58934804728, 73668505910, 147337011820, 294674023640, 523046391961, 1046092783922, 2092185567844, 2615231959805, 4184371135688, 5230463919610, 10460927839220, 20921855678440]

約数ペア:

[(1, 20921855678440), (2, 10460927839220), (4, 5230463919610), (5, 4184371135688), (8, 2615231959805), (10, 2092185567844), (20, 1046092783922), (40, 523046391961), (71, 294674023640), (142, 147337011820), (284, 73668505910), (355, 58934804728), (568, 36834252955), (710, 29467402364), (1420, 14733701182), (2029, 10311412360), (2840, 7366850591), (4058, 5155706180), (8116, 2577853090), (10145, 2062282472), (16232, 1288926545), (20290, 1031141236), (40580, 515570618), (81160, 257785309), (144059, 145231160), (288118, 72615580), (576236, 36307790), (720295, 29046232), (1152472, 18153895), (1440590, 14523116), (2881180, 7261558), (3630779, 5762360)]