20885865

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{107}}^1$

素因数の和:159

約数の個数: 96

約数和(自身を含む): 45536256

約数和(自身を除く): 24650391

約数列:

[1, 3, 5, 7, 11, 13, 15, 21, 33, 35, 39, 55, 65, 77, 91, 105, 107, 143, 165, 169, 195, 231, 273, 321, 385, 429, 455, 507, 535, 715, 749, 845, 1001, 1155, 1177, 1183, 1365, 1391, 1605, 1859, 2145, 2247, 2535, 3003, 3531, 3549, 3745, 4173, 5005, 5577, 5885, 5915, 6955, 8239, 9295, 9737, 11235, 13013, 15015, 15301, 17655, 17745, 18083, 20865, 24717, 27885, 29211, 39039, 41195, 45903, 48685, 54249, 65065, 76505, 90415, 107107, 123585, 126581, 146055, 195195, 198913, 229515, 271245, 321321, 379743, 535535, 596739, 632905, 994565, 1392391, 1606605, 1898715, 2983695, 4177173, 6961955, 20885865]

約数ペア:

[(1, 20885865), (3, 6961955), (5, 4177173), (7, 2983695), (11, 1898715), (13, 1606605), (15, 1392391), (21, 994565), (33, 632905), (35, 596739), (39, 535535), (55, 379743), (65, 321321), (77, 271245), (91, 229515), (105, 198913), (107, 195195), (143, 146055), (165, 126581), (169, 123585), (195, 107107), (231, 90415), (273, 76505), (321, 65065), (385, 54249), (429, 48685), (455, 45903), (507, 41195), (535, 39039), (715, 29211), (749, 27885), (845, 24717), (1001, 20865), (1155, 18083), (1177, 17745), (1183, 17655), (1365, 15301), (1391, 15015), (1605, 13013), (1859, 11235), (2145, 9737), (2247, 9295), (2535, 8239), (3003, 6955), (3531, 5915), (3549, 5885), (3745, 5577), (4173, 5005)]