661819851520

素因数分解:

$2^8\times 5^1\times {\mathrm{661}}^1\times {\mathrm{782219}}^1$

素因数の和:782901

約数の個数: 72

約数和(自身を含む): 1587665676240

約数和(自身を除く): 925845824720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 661, 1280, 1322, 2644, 3305, 5288, 6610, 10576, 13220, 21152, 26440, 42304, 52880, 84608, 105760, 169216, 211520, 423040, 782219, 846080, 1564438, 3128876, 3911095, 6257752, 7822190, 12515504, 15644380, 25031008, 31288760, 50062016, 62577520, 100124032, 125155040, 200248064, 250310080, 500620160, 517046759, 1001240320, 1034093518, 2068187036, 2585233795, 4136374072, 5170467590, 8272748144, 10340935180, 16545496288, 20681870360, 33090992576, 41363740720, 66181985152, 82727481440, 132363970304, 165454962880, 330909925760, 661819851520]

約数ペア:

[(1, 661819851520), (2, 330909925760), (4, 165454962880), (5, 132363970304), (8, 82727481440), (10, 66181985152), (16, 41363740720), (20, 33090992576), (32, 20681870360), (40, 16545496288), (64, 10340935180), (80, 8272748144), (128, 5170467590), (160, 4136374072), (256, 2585233795), (320, 2068187036), (640, 1034093518), (661, 1001240320), (1280, 517046759), (1322, 500620160), (2644, 250310080), (3305, 200248064), (5288, 125155040), (6610, 100124032), (10576, 62577520), (13220, 50062016), (21152, 31288760), (26440, 25031008), (42304, 15644380), (52880, 12515504), (84608, 7822190), (105760, 6257752), (169216, 3911095), (211520, 3128876), (423040, 1564438), (782219, 846080)]