21000827205

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{41143}}^1$

素因数の和:41375

約数の個数: 64

約数和(自身を含む): 39498240000

約数和(自身を除く): 18497412795

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 199, 285, 513, 597, 855, 995, 1791, 2565, 2985, 3781, 5373, 8955, 11343, 18905, 26865, 34029, 41143, 56715, 102087, 123429, 170145, 205715, 370287, 510435, 617145, 781717, 1110861, 1851435, 2345151, 3908585, 5554305, 7035453, 8187457, 11725755, 21106359, 24562371, 35177265, 40937285, 73687113, 105531795, 122811855, 155561683, 221061339, 368435565, 466685049, 777808415, 1105306695, 1400055147, 2333425245, 4200165441, 7000275735, 21000827205]

約数ペア:

[(1, 21000827205), (3, 7000275735), (5, 4200165441), (9, 2333425245), (15, 1400055147), (19, 1105306695), (27, 777808415), (45, 466685049), (57, 368435565), (95, 221061339), (135, 155561683), (171, 122811855), (199, 105531795), (285, 73687113), (513, 40937285), (597, 35177265), (855, 24562371), (995, 21106359), (1791, 11725755), (2565, 8187457), (2985, 7035453), (3781, 5554305), (5373, 3908585), (8955, 2345151), (11343, 1851435), (18905, 1110861), (26865, 781717), (34029, 617145), (41143, 510435), (56715, 370287), (102087, 205715), (123429, 170145)]