21056378

素因数分解:

$2^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:315

約数の個数: 48

約数和(自身を含む): 39398400

約数和(自身を除く): 18342022

約数列:

[1, 2, 7, 14, 29, 31, 49, 58, 62, 98, 203, 217, 239, 406, 434, 478, 899, 1421, 1519, 1673, 1798, 2842, 3038, 3346, 6293, 6931, 7409, 11711, 12586, 13862, 14818, 23422, 44051, 48517, 51863, 88102, 97034, 103726, 214861, 339619, 363041, 429722, 679238, 726082, 1504027, 3008054, 10528189, 21056378]

約数ペア:

[(1, 21056378), (2, 10528189), (7, 3008054), (14, 1504027), (29, 726082), (31, 679238), (49, 429722), (58, 363041), (62, 339619), (98, 214861), (203, 103726), (217, 97034), (239, 88102), (406, 51863), (434, 48517), (478, 44051), (899, 23422), (1421, 14818), (1519, 13862), (1673, 12586), (1798, 11711), (2842, 7409), (3038, 6931), (3346, 6293)]