21054859

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:295

約数の個数: 24

約数和(自身を含む): 25740288

約数和(自身を除く): 4685429

約数列:

[1, 7, 31, 49, 83, 167, 217, 581, 1169, 1519, 2573, 4067, 5177, 8183, 13861, 18011, 36239, 97027, 126077, 253673, 429691, 679189, 3007837, 21054859]

約数ペア:

[(1, 21054859), (7, 3007837), (31, 679189), (49, 429691), (83, 253673), (167, 126077), (217, 97027), (581, 36239), (1169, 18011), (1519, 13861), (2573, 8183), (4067, 5177)]