19938961520

素因数分解:

$2^4\times 5^1\times {\mathrm{249237019}}^1$

素因数の和:249237032

約数の個数: 20

約数和(自身を含む): 46358085720

約数和(自身を除く): 26419124200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249237019, 498474038, 996948076, 1246185095, 1993896152, 2492370190, 3987792304, 4984740380, 9969480760, 19938961520]

約数ペア:

[(1, 19938961520), (2, 9969480760), (4, 4984740380), (5, 3987792304), (8, 2492370190), (10, 1993896152), (16, 1246185095), (20, 996948076), (40, 498474038), (80, 249237019)]