16871560

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1999}}^1$

素因数の和:2221

約数の個数: 32

約数和(自身を含む): 38160000

約数和(自身を除く): 21288440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 1999, 2110, 3998, 4220, 7996, 8440, 9995, 15992, 19990, 39980, 79960, 421789, 843578, 1687156, 2108945, 3374312, 4217890, 8435780, 16871560]

約数ペア:

[(1, 16871560), (2, 8435780), (4, 4217890), (5, 3374312), (8, 2108945), (10, 1687156), (20, 843578), (40, 421789), (211, 79960), (422, 39980), (844, 19990), (1055, 15992), (1688, 9995), (1999, 8440), (2110, 7996), (3998, 4220)]