217911925

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:331

約数の個数: 72

約数和(自身を含む): 349102656

約数和(自身を除く): 131190731

約数列:

[1, 5, 7, 11, 25, 35, 41, 55, 77, 121, 175, 205, 251, 275, 287, 385, 451, 605, 847, 1025, 1255, 1435, 1757, 1925, 2255, 2761, 3025, 3157, 4235, 4961, 6275, 7175, 8785, 10291, 11275, 13805, 15785, 19327, 21175, 24805, 30371, 34727, 43925, 51455, 69025, 72037, 78925, 96635, 113201, 124025, 151855, 173635, 212597, 257275, 360185, 483175, 566005, 759275, 792407, 868175, 1062985, 1245211, 1800925, 2830025, 3962035, 5314925, 6226055, 8716477, 19810175, 31130275, 43582385, 217911925]

約数ペア:

[(1, 217911925), (5, 43582385), (7, 31130275), (11, 19810175), (25, 8716477), (35, 6226055), (41, 5314925), (55, 3962035), (77, 2830025), (121, 1800925), (175, 1245211), (205, 1062985), (251, 868175), (275, 792407), (287, 759275), (385, 566005), (451, 483175), (605, 360185), (847, 257275), (1025, 212597), (1255, 173635), (1435, 151855), (1757, 124025), (1925, 113201), (2255, 96635), (2761, 78925), (3025, 72037), (3157, 69025), (4235, 51455), (4961, 43925), (6275, 34727), (7175, 30371), (8785, 24805), (10291, 21175), (11275, 19327), (13805, 15785)]