16921905

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1$

素因数の和:76

約数の個数: 128

約数和(自身を含む): 38707200

約数和(自身を除く): 21785295

約数列:

[1, 3, 5, 7, 11, 13, 15, 21, 23, 33, 35, 39, 49, 55, 65, 69, 77, 91, 105, 115, 143, 147, 161, 165, 195, 231, 245, 253, 273, 299, 343, 345, 385, 429, 455, 483, 539, 637, 715, 735, 759, 805, 897, 1001, 1029, 1127, 1155, 1265, 1365, 1495, 1617, 1715, 1771, 1911, 2093, 2145, 2415, 2695, 3003, 3185, 3289, 3381, 3773, 3795, 4459, 4485, 5005, 5145, 5313, 5635, 6279, 7007, 7889, 8085, 8855, 9555, 9867, 10465, 11319, 12397, 13377, 14651, 15015, 16445, 16905, 18865, 21021, 22295, 23023, 23667, 26565, 31395, 35035, 37191, 39445, 43953, 49049, 49335, 56595, 61985, 66885, 69069, 73255, 86779, 102557, 105105, 115115, 118335, 147147, 161161, 185955, 219765, 245245, 260337, 307671, 345345, 433895, 483483, 512785, 735735, 805805, 1128127, 1301685, 1538355, 2417415, 3384381, 5640635, 16921905]

約数ペア:

[(1, 16921905), (3, 5640635), (5, 3384381), (7, 2417415), (11, 1538355), (13, 1301685), (15, 1128127), (21, 805805), (23, 735735), (33, 512785), (35, 483483), (39, 433895), (49, 345345), (55, 307671), (65, 260337), (69, 245245), (77, 219765), (91, 185955), (105, 161161), (115, 147147), (143, 118335), (147, 115115), (161, 105105), (165, 102557), (195, 86779), (231, 73255), (245, 69069), (253, 66885), (273, 61985), (299, 56595), (343, 49335), (345, 49049), (385, 43953), (429, 39445), (455, 37191), (483, 35035), (539, 31395), (637, 26565), (715, 23667), (735, 23023), (759, 22295), (805, 21021), (897, 18865), (1001, 16905), (1029, 16445), (1127, 15015), (1155, 14651), (1265, 13377), (1365, 12397), (1495, 11319), (1617, 10465), (1715, 9867), (1771, 9555), (1911, 8855), (2093, 8085), (2145, 7889), (2415, 7007), (2695, 6279), (3003, 5635), (3185, 5313), (3289, 5145), (3381, 5005), (3773, 4485), (3795, 4459)]