21157376

素因数分解:

$2^9\times {\mathrm{31}}^2\times {\mathrm{43}}^1$

素因数の和:123

約数の個数: 60

約数和(自身を含む): 44696916

約数和(自身を除く): 23539540

約数列:

[1, 2, 4, 8, 16, 31, 32, 43, 62, 64, 86, 124, 128, 172, 248, 256, 344, 496, 512, 688, 961, 992, 1333, 1376, 1922, 1984, 2666, 2752, 3844, 3968, 5332, 5504, 7688, 7936, 10664, 11008, 15376, 15872, 21328, 22016, 30752, 41323, 42656, 61504, 82646, 85312, 123008, 165292, 170624, 246016, 330584, 341248, 492032, 661168, 682496, 1322336, 2644672, 5289344, 10578688, 21157376]

約数ペア:

[(1, 21157376), (2, 10578688), (4, 5289344), (8, 2644672), (16, 1322336), (31, 682496), (32, 661168), (43, 492032), (62, 341248), (64, 330584), (86, 246016), (124, 170624), (128, 165292), (172, 123008), (248, 85312), (256, 82646), (344, 61504), (496, 42656), (512, 41323), (688, 30752), (961, 22016), (992, 21328), (1333, 15872), (1376, 15376), (1922, 11008), (1984, 10664), (2666, 7936), (2752, 7688), (3844, 5504), (3968, 5332)]