20407520

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{137}}^1$

素因数の和:185

約数の個数: 144

約数和(自身を含む): 59466960

約数和(自身を除く): 39059440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 49, 56, 70, 76, 80, 95, 98, 112, 133, 137, 140, 152, 160, 190, 196, 224, 245, 266, 274, 280, 304, 380, 392, 490, 532, 548, 560, 608, 665, 685, 760, 784, 931, 959, 980, 1064, 1096, 1120, 1330, 1370, 1520, 1568, 1862, 1918, 1960, 2128, 2192, 2603, 2660, 2740, 3040, 3724, 3836, 3920, 4256, 4384, 4655, 4795, 5206, 5320, 5480, 6713, 7448, 7672, 7840, 9310, 9590, 10412, 10640, 10960, 13015, 13426, 14896, 15344, 18221, 18620, 19180, 20824, 21280, 21920, 26030, 26852, 29792, 30688, 33565, 36442, 37240, 38360, 41648, 52060, 53704, 67130, 72884, 74480, 76720, 83296, 91105, 104120, 107408, 127547, 134260, 145768, 148960, 153440, 182210, 208240, 214816, 255094, 268520, 291536, 364420, 416480, 510188, 537040, 583072, 637735, 728840, 1020376, 1074080, 1275470, 1457680, 2040752, 2550940, 2915360, 4081504, 5101880, 10203760, 20407520]

約数ペア:

[(1, 20407520), (2, 10203760), (4, 5101880), (5, 4081504), (7, 2915360), (8, 2550940), (10, 2040752), (14, 1457680), (16, 1275470), (19, 1074080), (20, 1020376), (28, 728840), (32, 637735), (35, 583072), (38, 537040), (40, 510188), (49, 416480), (56, 364420), (70, 291536), (76, 268520), (80, 255094), (95, 214816), (98, 208240), (112, 182210), (133, 153440), (137, 148960), (140, 145768), (152, 134260), (160, 127547), (190, 107408), (196, 104120), (224, 91105), (245, 83296), (266, 76720), (274, 74480), (280, 72884), (304, 67130), (380, 53704), (392, 52060), (490, 41648), (532, 38360), (548, 37240), (560, 36442), (608, 33565), (665, 30688), (685, 29792), (760, 26852), (784, 26030), (931, 21920), (959, 21280), (980, 20824), (1064, 19180), (1096, 18620), (1120, 18221), (1330, 15344), (1370, 14896), (1520, 13426), (1568, 13015), (1862, 10960), (1918, 10640), (1960, 10412), (2128, 9590), (2192, 9310), (2603, 7840), (2660, 7672), (2740, 7448), (3040, 6713), (3724, 5480), (3836, 5320), (3920, 5206), (4256, 4795), (4384, 4655)]