20284880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 160

約数和(自身を含む): 61067520

約数和(自身を除く): 40782640

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 37, 40, 44, 55, 56, 70, 74, 77, 80, 88, 89, 110, 112, 140, 148, 154, 176, 178, 185, 220, 259, 280, 296, 308, 356, 370, 385, 407, 440, 445, 518, 560, 592, 616, 623, 712, 740, 770, 814, 880, 890, 979, 1036, 1232, 1246, 1295, 1424, 1480, 1540, 1628, 1780, 1958, 2035, 2072, 2492, 2590, 2849, 2960, 3080, 3115, 3256, 3293, 3560, 3916, 4070, 4144, 4895, 4984, 5180, 5698, 6160, 6230, 6512, 6586, 6853, 7120, 7832, 8140, 9790, 9968, 10360, 11396, 12460, 13172, 13706, 14245, 15664, 16280, 16465, 19580, 20720, 22792, 23051, 24920, 26344, 27412, 28490, 32560, 32930, 34265, 36223, 39160, 45584, 46102, 49840, 52688, 54824, 56980, 65860, 68530, 72446, 78320, 92204, 109648, 113960, 115255, 131720, 137060, 144892, 181115, 184408, 227920, 230510, 253561, 263440, 274120, 289784, 362230, 368816, 461020, 507122, 548240, 579568, 724460, 922040, 1014244, 1267805, 1448920, 1844080, 2028488, 2535610, 2897840, 4056976, 5071220, 10142440, 20284880]

約数ペア:

[(1, 20284880), (2, 10142440), (4, 5071220), (5, 4056976), (7, 2897840), (8, 2535610), (10, 2028488), (11, 1844080), (14, 1448920), (16, 1267805), (20, 1014244), (22, 922040), (28, 724460), (35, 579568), (37, 548240), (40, 507122), (44, 461020), (55, 368816), (56, 362230), (70, 289784), (74, 274120), (77, 263440), (80, 253561), (88, 230510), (89, 227920), (110, 184408), (112, 181115), (140, 144892), (148, 137060), (154, 131720), (176, 115255), (178, 113960), (185, 109648), (220, 92204), (259, 78320), (280, 72446), (296, 68530), (308, 65860), (356, 56980), (370, 54824), (385, 52688), (407, 49840), (440, 46102), (445, 45584), (518, 39160), (560, 36223), (592, 34265), (616, 32930), (623, 32560), (712, 28490), (740, 27412), (770, 26344), (814, 24920), (880, 23051), (890, 22792), (979, 20720), (1036, 19580), (1232, 16465), (1246, 16280), (1295, 15664), (1424, 14245), (1480, 13706), (1540, 13172), (1628, 12460), (1780, 11396), (1958, 10360), (2035, 9968), (2072, 9790), (2492, 8140), (2590, 7832), (2849, 7120), (2960, 6853), (3080, 6586), (3115, 6512), (3256, 6230), (3293, 6160), (3560, 5698), (3916, 5180), (4070, 4984), (4144, 4895)]