19874715

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 38568960

約数和(自身を除く): 18694245

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 61, 87, 105, 107, 145, 183, 203, 305, 321, 427, 435, 535, 609, 749, 915, 1015, 1281, 1605, 1769, 2135, 2247, 3045, 3103, 3745, 5307, 6405, 6527, 8845, 9309, 11235, 12383, 15515, 19581, 21721, 26535, 32635, 37149, 45689, 46545, 61915, 65163, 97905, 108605, 137067, 185745, 189283, 228445, 325815, 567849, 685335, 946415, 1324981, 2839245, 3974943, 6624905, 19874715]

約数ペア:

[(1, 19874715), (3, 6624905), (5, 3974943), (7, 2839245), (15, 1324981), (21, 946415), (29, 685335), (35, 567849), (61, 325815), (87, 228445), (105, 189283), (107, 185745), (145, 137067), (183, 108605), (203, 97905), (305, 65163), (321, 61915), (427, 46545), (435, 45689), (535, 37149), (609, 32635), (749, 26535), (915, 21721), (1015, 19581), (1281, 15515), (1605, 12383), (1769, 11235), (2135, 9309), (2247, 8845), (3045, 6527), (3103, 6405), (3745, 5307)]