20502440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1979}}^1$

素因数の和:2034

約数の個数: 64

約数和(自身を含む): 54172800

約数和(自身を除く): 33670360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 56, 70, 74, 140, 148, 185, 259, 280, 296, 370, 518, 740, 1036, 1295, 1480, 1979, 2072, 2590, 3958, 5180, 7916, 9895, 10360, 13853, 15832, 19790, 27706, 39580, 55412, 69265, 73223, 79160, 110824, 138530, 146446, 277060, 292892, 366115, 512561, 554120, 585784, 732230, 1025122, 1464460, 2050244, 2562805, 2928920, 4100488, 5125610, 10251220, 20502440]

約数ペア:

[(1, 20502440), (2, 10251220), (4, 5125610), (5, 4100488), (7, 2928920), (8, 2562805), (10, 2050244), (14, 1464460), (20, 1025122), (28, 732230), (35, 585784), (37, 554120), (40, 512561), (56, 366115), (70, 292892), (74, 277060), (140, 146446), (148, 138530), (185, 110824), (259, 79160), (280, 73223), (296, 69265), (370, 55412), (518, 39580), (740, 27706), (1036, 19790), (1295, 15832), (1480, 13853), (1979, 10360), (2072, 9895), (2590, 7916), (3958, 5180)]