261721620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20479}}^1$

素因数の和:20565

約数の個数: 72

約数和(自身を含む): 805109760

約数和(自身を除く): 543388140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 2130, 2556, 3195, 4260, 6390, 12780, 20479, 40958, 61437, 81916, 102395, 122874, 184311, 204790, 245748, 307185, 368622, 409580, 614370, 737244, 921555, 1228740, 1454009, 1843110, 2908018, 3686220, 4362027, 5816036, 7270045, 8724054, 13086081, 14540090, 17448108, 21810135, 26172162, 29080180, 43620270, 52344324, 65430405, 87240540, 130860810, 261721620]

約数ペア:

[(1, 261721620), (2, 130860810), (3, 87240540), (4, 65430405), (5, 52344324), (6, 43620270), (9, 29080180), (10, 26172162), (12, 21810135), (15, 17448108), (18, 14540090), (20, 13086081), (30, 8724054), (36, 7270045), (45, 5816036), (60, 4362027), (71, 3686220), (90, 2908018), (142, 1843110), (180, 1454009), (213, 1228740), (284, 921555), (355, 737244), (426, 614370), (639, 409580), (710, 368622), (852, 307185), (1065, 245748), (1278, 204790), (1420, 184311), (2130, 122874), (2556, 102395), (3195, 81916), (4260, 61437), (6390, 40958), (12780, 20479)]