20711457

素因数分解:

$3^4\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1$

素因数の和:144

約数の個数: 60

約数和(自身を含む): 35871660

約数和(自身を除く): 15160203

約数列:

[1, 3, 9, 13, 17, 27, 39, 51, 81, 89, 117, 153, 169, 221, 267, 351, 459, 507, 663, 801, 1053, 1157, 1377, 1513, 1521, 1989, 2403, 2873, 3471, 4539, 4563, 5967, 7209, 8619, 10413, 13617, 13689, 15041, 17901, 19669, 25857, 31239, 40851, 45123, 59007, 77571, 93717, 122553, 135369, 177021, 232713, 255697, 406107, 531063, 767091, 1218321, 1593189, 2301273, 6903819, 20711457]

約数ペア:

[(1, 20711457), (3, 6903819), (9, 2301273), (13, 1593189), (17, 1218321), (27, 767091), (39, 531063), (51, 406107), (81, 255697), (89, 232713), (117, 177021), (153, 135369), (169, 122553), (221, 93717), (267, 77571), (351, 59007), (459, 45123), (507, 40851), (663, 31239), (801, 25857), (1053, 19669), (1157, 17901), (1377, 15041), (1513, 13689), (1521, 13617), (1989, 10413), (2403, 8619), (2873, 7209), (3471, 5967), (4539, 4563)]