20387115

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1061}}^1$

素因数の和:1140

約数の個数: 48

約数和(自身を含む): 41086656

約数和(自身を除く): 20699541

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 61, 63, 105, 183, 305, 315, 427, 549, 915, 1061, 1281, 2135, 2745, 3183, 3843, 5305, 6405, 7427, 9549, 15915, 19215, 22281, 37135, 47745, 64721, 66843, 111405, 194163, 323605, 334215, 453047, 582489, 970815, 1359141, 2265235, 2912445, 4077423, 6795705, 20387115]

約数ペア:

[(1, 20387115), (3, 6795705), (5, 4077423), (7, 2912445), (9, 2265235), (15, 1359141), (21, 970815), (35, 582489), (45, 453047), (61, 334215), (63, 323605), (105, 194163), (183, 111405), (305, 66843), (315, 64721), (427, 47745), (549, 37135), (915, 22281), (1061, 19215), (1281, 15915), (2135, 9549), (2745, 7427), (3183, 6405), (3843, 5305)]