21125776

素因数分解:

$2^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:236

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 28871024

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 46, 56, 59, 92, 112, 118, 139, 161, 184, 236, 278, 322, 368, 413, 472, 556, 644, 826, 944, 973, 1112, 1288, 1357, 1652, 1946, 2224, 2576, 2714, 3197, 3304, 3892, 5428, 6394, 6608, 7784, 8201, 9499, 10856, 12788, 15568, 16402, 18998, 21712, 22379, 25576, 32804, 37996, 44758, 51152, 57407, 65608, 75992, 89516, 114814, 131216, 151984, 179032, 188623, 229628, 358064, 377246, 459256, 754492, 918512, 1320361, 1508984, 2640722, 3017968, 5281444, 10562888, 21125776]

約数ペア:

[(1, 21125776), (2, 10562888), (4, 5281444), (7, 3017968), (8, 2640722), (14, 1508984), (16, 1320361), (23, 918512), (28, 754492), (46, 459256), (56, 377246), (59, 358064), (92, 229628), (112, 188623), (118, 179032), (139, 151984), (161, 131216), (184, 114814), (236, 89516), (278, 75992), (322, 65608), (368, 57407), (413, 51152), (472, 44758), (556, 37996), (644, 32804), (826, 25576), (944, 22379), (973, 21712), (1112, 18998), (1288, 16402), (1357, 15568), (1652, 12788), (1946, 10856), (2224, 9499), (2576, 8201), (2714, 7784), (3197, 6608), (3304, 6394), (3892, 5428)]