21278264

素因数分解:

$2^3\times 7^1\times {\mathrm{61}}^1\times {\mathrm{6229}}^1$

素因数の和:6303

約数の個数: 32

約数和(自身を含む): 46351200

約数和(自身を除く): 25072936

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 61, 122, 244, 427, 488, 854, 1708, 3416, 6229, 12458, 24916, 43603, 49832, 87206, 174412, 348824, 379969, 759938, 1519876, 2659783, 3039752, 5319566, 10639132, 21278264]

約数ペア:

[(1, 21278264), (2, 10639132), (4, 5319566), (7, 3039752), (8, 2659783), (14, 1519876), (28, 759938), (56, 379969), (61, 348824), (122, 174412), (244, 87206), (427, 49832), (488, 43603), (854, 24916), (1708, 12458), (3416, 6229)]