21219345

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:143

約数の個数: 96

約数和(自身を含む): 45287424

約数和(自身を除く): 24068079

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 41, 45, 53, 63, 93, 105, 123, 155, 159, 205, 217, 265, 279, 287, 315, 369, 371, 465, 477, 615, 651, 795, 861, 1085, 1113, 1271, 1395, 1435, 1643, 1845, 1855, 1953, 2173, 2385, 2583, 3255, 3339, 3813, 4305, 4929, 5565, 6355, 6519, 8215, 8897, 9765, 10865, 11439, 11501, 12915, 14787, 15211, 16695, 19065, 19557, 24645, 26691, 32595, 34503, 44485, 45633, 57195, 57505, 67363, 73935, 76055, 80073, 97785, 103509, 133455, 136899, 172515, 202089, 228165, 336815, 400365, 471541, 517545, 606267, 684495, 1010445, 1414623, 2357705, 3031335, 4243869, 7073115, 21219345]

約数ペア:

[(1, 21219345), (3, 7073115), (5, 4243869), (7, 3031335), (9, 2357705), (15, 1414623), (21, 1010445), (31, 684495), (35, 606267), (41, 517545), (45, 471541), (53, 400365), (63, 336815), (93, 228165), (105, 202089), (123, 172515), (155, 136899), (159, 133455), (205, 103509), (217, 97785), (265, 80073), (279, 76055), (287, 73935), (315, 67363), (369, 57505), (371, 57195), (465, 45633), (477, 44485), (615, 34503), (651, 32595), (795, 26691), (861, 24645), (1085, 19557), (1113, 19065), (1271, 16695), (1395, 15211), (1435, 14787), (1643, 12915), (1845, 11501), (1855, 11439), (1953, 10865), (2173, 9765), (2385, 8897), (2583, 8215), (3255, 6519), (3339, 6355), (3813, 5565), (4305, 4929)]