20971000

素因数分解:

$2^3\times 5^3\times {\mathrm{67}}^1\times {\mathrm{313}}^1$

素因数の和:401

約数の個数: 64

約数和(自身を含む): 49963680

約数和(自身を除く): 28992680

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 67, 100, 125, 134, 200, 250, 268, 313, 335, 500, 536, 626, 670, 1000, 1252, 1340, 1565, 1675, 2504, 2680, 3130, 3350, 6260, 6700, 7825, 8375, 12520, 13400, 15650, 16750, 20971, 31300, 33500, 39125, 41942, 62600, 67000, 78250, 83884, 104855, 156500, 167768, 209710, 313000, 419420, 524275, 838840, 1048550, 2097100, 2621375, 4194200, 5242750, 10485500, 20971000]

約数ペア:

[(1, 20971000), (2, 10485500), (4, 5242750), (5, 4194200), (8, 2621375), (10, 2097100), (20, 1048550), (25, 838840), (40, 524275), (50, 419420), (67, 313000), (100, 209710), (125, 167768), (134, 156500), (200, 104855), (250, 83884), (268, 78250), (313, 67000), (335, 62600), (500, 41942), (536, 39125), (626, 33500), (670, 31300), (1000, 20971), (1252, 16750), (1340, 15650), (1565, 13400), (1675, 12520), (2504, 8375), (2680, 7825), (3130, 6700), (3350, 6260)]