21000688280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{3671449}}^1$

素因数の和:3671484

約数の個数: 64

約数和(自身を含む): 55512324000

約数和(自身を除く): 34511635720

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 26, 40, 44, 52, 55, 65, 88, 104, 110, 130, 143, 220, 260, 286, 440, 520, 572, 715, 1144, 1430, 2860, 5720, 3671449, 7342898, 14685796, 18357245, 29371592, 36714490, 40385939, 47728837, 73428980, 80771878, 95457674, 146857960, 161543756, 190915348, 201929695, 238644185, 323087512, 381830696, 403859390, 477288370, 525017207, 807718780, 954576740, 1050034414, 1615437560, 1909153480, 2100068828, 2625086035, 4200137656, 5250172070, 10500344140, 21000688280]

約数ペア:

[(1, 21000688280), (2, 10500344140), (4, 5250172070), (5, 4200137656), (8, 2625086035), (10, 2100068828), (11, 1909153480), (13, 1615437560), (20, 1050034414), (22, 954576740), (26, 807718780), (40, 525017207), (44, 477288370), (52, 403859390), (55, 381830696), (65, 323087512), (88, 238644185), (104, 201929695), (110, 190915348), (130, 161543756), (143, 146857960), (220, 95457674), (260, 80771878), (286, 73428980), (440, 47728837), (520, 40385939), (572, 36714490), (715, 29371592), (1144, 18357245), (1430, 14685796), (2860, 7342898), (5720, 3671449)]