21000985408

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{557}}^1\times {\mathrm{45317}}^1$

素因数の和:45899

約数の個数: 56

約数和(自身を含む): 44961075432

約数和(自身を除く): 23960090024

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 208, 416, 557, 832, 1114, 2228, 4456, 7241, 8912, 14482, 17824, 28964, 35648, 45317, 57928, 90634, 115856, 181268, 231712, 362536, 463424, 589121, 725072, 1178242, 1450144, 2356484, 2900288, 4712968, 9425936, 18851872, 25241569, 37703744, 50483138, 100966276, 201932552, 328140397, 403865104, 656280794, 807730208, 1312561588, 1615460416, 2625123176, 5250246352, 10500492704, 21000985408]

約数ペア:

[(1, 21000985408), (2, 10500492704), (4, 5250246352), (8, 2625123176), (13, 1615460416), (16, 1312561588), (26, 807730208), (32, 656280794), (52, 403865104), (64, 328140397), (104, 201932552), (208, 100966276), (416, 50483138), (557, 37703744), (832, 25241569), (1114, 18851872), (2228, 9425936), (4456, 4712968), (7241, 2900288), (8912, 2356484), (14482, 1450144), (17824, 1178242), (28964, 725072), (35648, 589121), (45317, 463424), (57928, 362536), (90634, 231712), (115856, 181268)]