20915286

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:405

約数の個数: 64

約数和(自身を含む): 50400768

約数和(自身を除く): 29485482

約数列:

[1, 2, 3, 6, 7, 14, 21, 37, 42, 43, 74, 86, 111, 129, 222, 258, 259, 301, 313, 518, 602, 626, 777, 903, 939, 1554, 1591, 1806, 1878, 2191, 3182, 4382, 4773, 6573, 9546, 11137, 11581, 13146, 13459, 22274, 23162, 26918, 33411, 34743, 40377, 66822, 69486, 80754, 81067, 94213, 162134, 188426, 243201, 282639, 486402, 497983, 565278, 995966, 1493949, 2987898, 3485881, 6971762, 10457643, 20915286]

約数ペア:

[(1, 20915286), (2, 10457643), (3, 6971762), (6, 3485881), (7, 2987898), (14, 1493949), (21, 995966), (37, 565278), (42, 497983), (43, 486402), (74, 282639), (86, 243201), (111, 188426), (129, 162134), (222, 94213), (258, 81067), (259, 80754), (301, 69486), (313, 66822), (518, 40377), (602, 34743), (626, 33411), (777, 26918), (903, 23162), (939, 22274), (1554, 13459), (1591, 13146), (1806, 11581), (1878, 11137), (2191, 9546), (3182, 6573), (4382, 4773)]