20407600

素因数分解:

$2^4\times 5^2\times {\mathrm{163}}^1\times {\mathrm{313}}^1$

素因数の和:494

約数の個数: 60

約数和(自身を含む): 49487656

約数和(自身を除く): 29080056

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 163, 200, 313, 326, 400, 626, 652, 815, 1252, 1304, 1565, 1630, 2504, 2608, 3130, 3260, 4075, 5008, 6260, 6520, 7825, 8150, 12520, 13040, 15650, 16300, 25040, 31300, 32600, 51019, 62600, 65200, 102038, 125200, 204076, 255095, 408152, 510190, 816304, 1020380, 1275475, 2040760, 2550950, 4081520, 5101900, 10203800, 20407600]

約数ペア:

[(1, 20407600), (2, 10203800), (4, 5101900), (5, 4081520), (8, 2550950), (10, 2040760), (16, 1275475), (20, 1020380), (25, 816304), (40, 510190), (50, 408152), (80, 255095), (100, 204076), (163, 125200), (200, 102038), (313, 65200), (326, 62600), (400, 51019), (626, 32600), (652, 31300), (815, 25040), (1252, 16300), (1304, 15650), (1565, 13040), (1630, 12520), (2504, 8150), (2608, 7825), (3130, 6520), (3260, 6260), (4075, 5008)]