20978041

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1\times {\mathrm{349}}^1$

素因数の和:664

約数の個数: 16

約数和(自身を含む): 24908800

約数和(自身を除く): 3930759

約数列:

[1, 7, 31, 217, 277, 349, 1939, 2443, 8587, 10819, 60109, 75733, 96673, 676711, 2996863, 20978041]

約数ペア:

[(1, 20978041), (7, 2996863), (31, 676711), (217, 96673), (277, 75733), (349, 60109), (1939, 10819), (2443, 8587)]