20961360

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4159}}^1$

素因数の和:4185

約数の個数: 120

約数和(自身を含む): 80471040

約数和(自身を除く): 59509680

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4159, 5040, 8318, 12477, 16636, 20795, 24954, 29113, 33272, 37431, 41590, 49908, 58226, 62385, 66544, 74862, 83180, 87339, 99816, 116452, 124770, 145565, 149724, 166360, 174678, 187155, 199632, 232904, 249540, 262017, 291130, 299448, 332720, 349356, 374310, 436695, 465808, 499080, 524034, 582260, 598896, 698712, 748620, 873390, 998160, 1048068, 1164520, 1310085, 1397424, 1497240, 1746780, 2096136, 2329040, 2620170, 2994480, 3493560, 4192272, 5240340, 6987120, 10480680, 20961360]

約数ペア:

[(1, 20961360), (2, 10480680), (3, 6987120), (4, 5240340), (5, 4192272), (6, 3493560), (7, 2994480), (8, 2620170), (9, 2329040), (10, 2096136), (12, 1746780), (14, 1497240), (15, 1397424), (16, 1310085), (18, 1164520), (20, 1048068), (21, 998160), (24, 873390), (28, 748620), (30, 698712), (35, 598896), (36, 582260), (40, 524034), (42, 499080), (45, 465808), (48, 436695), (56, 374310), (60, 349356), (63, 332720), (70, 299448), (72, 291130), (80, 262017), (84, 249540), (90, 232904), (105, 199632), (112, 187155), (120, 174678), (126, 166360), (140, 149724), (144, 145565), (168, 124770), (180, 116452), (210, 99816), (240, 87339), (252, 83180), (280, 74862), (315, 66544), (336, 62385), (360, 58226), (420, 49908), (504, 41590), (560, 37431), (630, 33272), (720, 29113), (840, 24954), (1008, 20795), (1260, 16636), (1680, 12477), (2520, 8318), (4159, 5040)]