21451815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{151}}^1$

素因数の和:221

約数の個数: 96

約数和(自身を含む): 47803392

約数和(自身を除く): 26351577

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 41, 45, 55, 63, 77, 99, 105, 123, 151, 165, 205, 231, 287, 315, 369, 385, 451, 453, 495, 615, 693, 755, 861, 1057, 1155, 1353, 1359, 1435, 1661, 1845, 2255, 2265, 2583, 3157, 3171, 3465, 4059, 4305, 4983, 5285, 6191, 6765, 6795, 8305, 9471, 9513, 11627, 12915, 14949, 15785, 15855, 18573, 20295, 24915, 28413, 30955, 34881, 43337, 47355, 47565, 55719, 58135, 68101, 74745, 92865, 104643, 130011, 142065, 174405, 204303, 216685, 278595, 340505, 390033, 476707, 523215, 612909, 650055, 1021515, 1430121, 1950165, 2383535, 3064545, 4290363, 7150605, 21451815]

約数ペア:

[(1, 21451815), (3, 7150605), (5, 4290363), (7, 3064545), (9, 2383535), (11, 1950165), (15, 1430121), (21, 1021515), (33, 650055), (35, 612909), (41, 523215), (45, 476707), (55, 390033), (63, 340505), (77, 278595), (99, 216685), (105, 204303), (123, 174405), (151, 142065), (165, 130011), (205, 104643), (231, 92865), (287, 74745), (315, 68101), (369, 58135), (385, 55719), (451, 47565), (453, 47355), (495, 43337), (615, 34881), (693, 30955), (755, 28413), (861, 24915), (1057, 20295), (1155, 18573), (1353, 15855), (1359, 15785), (1435, 14949), (1661, 12915), (1845, 11627), (2255, 9513), (2265, 9471), (2583, 8305), (3157, 6795), (3171, 6765), (3465, 6191), (4059, 5285), (4305, 4983)]