21000427980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{6091}}^1\times {\mathrm{8209}}^1$

素因数の和:14319

約数の個数: 96

約数和(自身を含む): 67220590080

約数和(自身を除く): 46220162100

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 6091, 8209, 12182, 16418, 18273, 24364, 24627, 30455, 32836, 36546, 41045, 42637, 49254, 57463, 60910, 73092, 82090, 85274, 91365, 98508, 114926, 121820, 123135, 127911, 164180, 170548, 172389, 182730, 213185, 229852, 246270, 255822, 287315, 344778, 365460, 426370, 492540, 511644, 574630, 639555, 689556, 852740, 861945, 1149260, 1279110, 1723890, 2558220, 3447780, 50001019, 100002038, 150003057, 200004076, 250005095, 300006114, 350007133, 500010190, 600012228, 700014266, 750015285, 1000020380, 1050021399, 1400028532, 1500030570, 1750035665, 2100042798, 3000061140, 3500071330, 4200085596, 5250106995, 7000142660, 10500213990, 21000427980]

約数ペア:

[(1, 21000427980), (2, 10500213990), (3, 7000142660), (4, 5250106995), (5, 4200085596), (6, 3500071330), (7, 3000061140), (10, 2100042798), (12, 1750035665), (14, 1500030570), (15, 1400028532), (20, 1050021399), (21, 1000020380), (28, 750015285), (30, 700014266), (35, 600012228), (42, 500010190), (60, 350007133), (70, 300006114), (84, 250005095), (105, 200004076), (140, 150003057), (210, 100002038), (420, 50001019), (6091, 3447780), (8209, 2558220), (12182, 1723890), (16418, 1279110), (18273, 1149260), (24364, 861945), (24627, 852740), (30455, 689556), (32836, 639555), (36546, 574630), (41045, 511644), (42637, 492540), (49254, 426370), (57463, 365460), (60910, 344778), (73092, 287315), (82090, 255822), (85274, 246270), (91365, 229852), (98508, 213185), (114926, 182730), (121820, 172389), (123135, 170548), (127911, 164180)]