21423325

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 34283520

約数和(自身を除く): 12860195

約数列:

[1, 5, 7, 11, 25, 31, 35, 55, 77, 155, 175, 217, 275, 341, 359, 385, 775, 1085, 1705, 1795, 1925, 2387, 2513, 3949, 5425, 8525, 8975, 11129, 11935, 12565, 19745, 27643, 55645, 59675, 62825, 77903, 98725, 122419, 138215, 278225, 389515, 612095, 691075, 856933, 1947575, 3060475, 4284665, 21423325]

約数ペア:

[(1, 21423325), (5, 4284665), (7, 3060475), (11, 1947575), (25, 856933), (31, 691075), (35, 612095), (55, 389515), (77, 278225), (155, 138215), (175, 122419), (217, 98725), (275, 77903), (341, 62825), (359, 59675), (385, 55645), (775, 27643), (1085, 19745), (1705, 12565), (1795, 11935), (1925, 11129), (2387, 8975), (2513, 8525), (3949, 5425)]