21009015

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{193}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 38132640

約数和(自身を除く): 17123625

約数列:

[1, 3, 5, 9, 15, 41, 45, 59, 123, 177, 193, 205, 295, 369, 531, 579, 615, 885, 965, 1737, 1845, 2419, 2655, 2895, 7257, 7913, 8685, 11387, 12095, 21771, 23739, 34161, 36285, 39565, 56935, 71217, 102483, 108855, 118695, 170805, 356085, 466867, 512415, 1400601, 2334335, 4201803, 7003005, 21009015]

約数ペア:

[(1, 21009015), (3, 7003005), (5, 4201803), (9, 2334335), (15, 1400601), (41, 512415), (45, 466867), (59, 356085), (123, 170805), (177, 118695), (193, 108855), (205, 102483), (295, 71217), (369, 56935), (531, 39565), (579, 36285), (615, 34161), (885, 23739), (965, 21771), (1737, 12095), (1845, 11387), (2419, 8685), (2655, 7913), (2895, 7257)]